unlimited concentration of wealth, such that the percentage of all wealth owned by a few entrepreneurs eventually approaches 100%. Correlation between being rich and earning more Given an initial condition in which wealth is unevenly distributed (i.e., a "wealth gap"), several non-exclusive economic mechanisms for wealth condensation have been proposed: A correlation between being rich and being given high-paid employment (oligarchy). A marginal propensity to consume low enough that high incomes are correlated with people who have already made themselves rich (meritocracy). The ability of the rich to influence government disproportionately to their favor thereby increasing their wealth (plutocracy). In the first case, being wealthy gives one the opportunity to earn more through high paid employment (e.g., by going to elite schools). In the second case, having high paid employment gives one the opportunity to become rich (by saving your money). In the case of plutocracy, the wealthy exert power over the legislative process, which enables them to increase the wealth disparity. An example of this is the high cost of political campaigning in some countries, in particular in the US (more generally, see also plutocratic finance). Because these mechanisms are non-exclusive, it is possible for all three explanations to work together for a compounding effect, increasing wealth concentration even further. Obstacles to restoring wage growth might have more to do with the broader dysfunction of a dollar dominated system particular to the US than with the role of the extremely wealthy. Counterbalances to wealth concentration include certain forms of taxation, in particular wealth tax, inheritance tax and progressive taxation of income. However, concentrated wealth does not necessarily inhibit wage growth for ordinary workers with low wages. Markets with social influence Product recommendations and information about past purchases have been shown to influence consumers choices significantly whether it is for music, movie, book, technological, and other type of products. Social influence often induces a rich-get-richer phenomenon (Matthew effect) where popular products tend to become even more popular. Redistribution of wealth and public policy In many societies, attempts have been made, through property redistribution, taxation, or regulation, to redistribute wealth, sometimes in support of the upper class, and sometimes to diminish economic inequality. Examples of this practice go back at least to the Roman republic in the third century B.C., when laws were passed limiting the amount of wealth or land that could be owned by any one family. Motivations for