Quote from bwolinsky:
In the end everyone gets richer. If you want proof, you can look at the percentage of individuals or families making $70,000 or more or whatever amount and see that proportion from the 50's to now has grown by leaps and bounds.
It's not a race to the bottom, but a race to the top, and all of the empirical evidence out there supports that fact. Any evidence to the contrary is from people without any data to back up what they're saying.
Two notes:
1) you assumed costant purchase value of money. It is disproved by barely existence of CPI.
2) You assumed no innovation (or at least, that all innovations value is assigned to innovators, disproved by a simple study on income of highly skilled technical people).
You're assuming the value of work of unskilled people is costant. Another valid assumption could be the contrary, on the premises that unskilled people relief more skilled people of work they should have done themself, so the value of their work raise as value of skilled work raise (althrough not at same level, to mantain incentive to invest on skill-building and innovation).
Think on domestic help: all work done by low-pay home helper is a relief for someone else with a higher value work.
Now when the latter's income raise, his/her break-even value for home work raise, and thus in the long run the value of home helper should raise, too. Innovation and productivity growth should benefit all the country, not only innovators.
Main problem today is that income growth of top 10% it is not anymore related to innovations or productivity growth, but only on bargaining power. Thus it is a zero-sum game, someone else have to pay for that growth, becoming poorer (absolutely poorer, not only relatively).
Income is becoming less and less a proxy for productivity.
IMO, of course.