Assumption #1
Prosperity provides the opportunity of health, home, family, education, creative expression, moderate travel and moderate leisure.
Assumption #2
Prosperity is derived from the production and exchange of diverse effort combined with diverse resources, i.e. goods and services.
Assumption #3
A prosperous society is more resilient, long lasting and self sustaining.
Assumption #4
A peoples would want to develop into a prosperous society.
Assumption #5
The most prosperous of societies is one in which all members are themselves prosperous.
Assumption #6
Conditions which reduce the prosperity of some while increasing the prosperity of others will arise.
Assumption #7
A prosperous society is one where the most and the least prosperous are within reasonable economic reach of each other.
Assumption #8
A prosperous society would want to govern itself such that the range between the most and least prosperous retained this dynamism.
Assumption #9
A prosperous society and its members respect the fundamental prosperity features of all its members.
Assumption #10
A prosperous society respects the fundamental rights and freedoms for all of its members; the rights of verbal, written and media expression, the right of religion, the right of gender orientation, the right of dignity, the freedom from oppression, the freedom from discrimination… See: Universal human rights…
Anonymole - apocryphal agitators 
“Now, new research suggests that social mobility in America may be even more limited than researchers have realized.”
https://www.washingtonpost.com/news/wonk/wp/2016/10/06/striking-new-research-on-inequality-whatever-you-thought-its-worse
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(in reply to the above article:)
Thank you for posting this where one of the proletariat could find it. I have examined this issue at length myself.
Our re-entry into a rentier society correlates well with your theory that labor and capital (property) are unequal competitors in a market economy. The more you own, the more you can make (charge, borrow).
The solution to such a situation is actually quite simple, yet impossible to enact, as our country now stands.
To reduce inequality people must share.
However, the 1% are not the 1% because they are a philanthropic lot. On the contrary, they are at the top of the wealth pyramid precisely because the do NOT share. Convincing them to do otherwise is impossible. Humans are greedy. That’s just the way it is. It is the rare oligarch who repents and returns to society that which he forcefully wrought from the worker that raised him to his wealth.
There are ways though, which we blue collars, and white collars and brown collars can fight back. We can doggedly fight for leaders in Congress who will enact laws that limit the leverage of the most powerful tool of the aristocrats — the corporation.
Corporations rule our land. Corporations are controlled, primarily, by the rich. Corporations, in turn, control our government. Corporations have been given rights that no human possesses. It is corporations that, if we can rein them in, restrict their power, reduce their leverage in our lobbying halls and political campaigns, we can reduce inequality by ensuring that the wealth created by these massively profitable entities — is shared by all.
Link to follow — Employee Income Inequality Tax
https://anonymole.wordpress.com/2016/01/16/employee-income-inequality-tax/
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http://evonomics.com/how-capitalism-actually-generates-more-inequality
“Using data from twenty-three developed countries and from the separate states of the United States, they observed negative correlations between inequality, on the one hand, and physical health, mental health, education, child well-being, social mobility, trust and community life, on the other hand.
…
Because waged employees are not slaves, they cannot use their lifetime capacity for work as collateral to obtain money loans. The very commercial freedom of workers denies them the possibility to use their labour assets or skills as collateral. By contrast, capitalists may use their property to make profits, and as collateral to borrow money, invest and make still more money. Differences become cumulative, between those with and without collateralizable assets, and between different amounts of collateralizable wealth. Even when workers become home-owners with mortgages, the wealthier can still race ahead.
Unlike owned capital, free labour power cannot be used as collateral to obtain loans for investment. At least in this respect, capital and labour do not meet on a level playing field, this asymmetry is a major driver of inequality.”
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I think this theory needs a name unto itself — Prosperism: the theory that a society would want to tend toward an equitable state of prosperity for all of its citizens.
Prosperism does not dictate the type of economy (capitalism, socialism, communism), nor does it dictate the type of government (democracy, aristocracy, republic, monarchy, theocracy, etc.), prosperism simply lays the foundation on which any economy and/or government should be founded, provided said economy and/or government is concerned with the prosperity of its citizens.
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A prosperous society attempts to ensure that the actions of any one member or group of members does not place onerous burden upon another member nor society as a whole. Such burdens being physically overt, psychological, or economic/financial.
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The prosperous society does not have an internet with posts like this:
http://whatever.scalzi.com/2005/09/03/being-poor/
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So what is the rational for the assumption that the prosperity levels, between the greatest and lowest, remain in some economic range? Why can’t they stretch and stretch until there may be some with incredible collections of wealth while there will still be those at the other end of the scale where the prosperity is barely adequate?
Humans are avaricious by nature. Greed drives everyone, to different degrees. In concert with greed is envy, another cardinal sin. It will take me some time but I will be collecting supporting articles which substantiate why extreme wealth inequality, driven by greed and envy, is a socially debilitating condition. A condition which reduces over all prosperity.
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The prosperous society would strive for those conditions where:
• those who wished to educate themselves — could,
• those who wished to have a family — could,
• those who wished to express themselves creatively — could,
• those who wished travel or enjoy moderate leisure — could.
The prosperous society is one where striving to provide the opportunity for the attainment of such benefits, to all its members, is its prime directive.
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