Hard to keep track of the squadops induced post-proliferation, but to go back to Danoff's point:
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Surely you realize that an increase in GDP per capita doesn't necessarily indicate anything about the standard of living of the average family?
The whole point of capitalism is that it allows the capitalist class - those who own the means of production - to increase productivity - which can be measured by GDP growth - while retaining the profits generated by that increase in productivity. Retaining the profits allows the capitalist to re-invest in new businesses, land, machinery, real estate etc. which allows the capitalist to make more profit & so on. In Marx's view this would eventually lead to the collapse of capitalism because concentration of wealth in the hands of the few would result in the impoverished masses no longer having the means to purchase the goods produced by the capitalist's businesses.
As it turned out, things did not ultimately follow this progression. Two disastrous World Wars, a Great Depression, revolution & a fear of revolution, & the growth of democratic power resulted in circumstances & government policy that actually led to
diminishing wealth inequalities during most of the 20th century. Those policies included things like social security, improved access to education & health care, unionization of workers, affirmative action & minimum wage laws & high marginal tax rates. There were still very wealthy individuals, but the gap between the very wealthy & the middle & working classes was much reduced.
All this began to change again after the introduction of "Trickle Down" economics in the 1980's. Much lower tax rates on the very wealthy & the consolidation of businesses (including banks) into larger & larger units led to an increasing concentration of wealth - especially for the "0.1%". The key factor was increasing globalization, which put many large, multi-national corporations out of the control of national democratic forces. Globalization allowed big corporations to by-pass local labour & environmental laws & undermined union power. It has also, gradually, opened new markets for goods in previously undeveloped countries, which also makes the capitalist class less dependent on Western consumers.
There are lots of statistics that show what's been happening in the US. This is what I've come up with:
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The figures indicate that since 1967 the top 5% of earners have done very well, the top 20% have also done well, the lower quintiles - particularly the lower 3 quintiles have seen very little increase in earning power in the last 50 years.
My suspicion is that the top 1% will have done significantly better than the top 5%, & the top .01% would be totally off the chart. I would guess that Trump supporters would figure heavily in the bottom 3 quintiles, people who have largely been left behind in the last few decades.