You're mistaken and given your responses elsewhere I think you're either confused or arguing in bad faith.
The mean tax rate paid by the top 0.1% of earners in 1979 was just over 40%. This fell to about 25% in 2010.[1] Marginal rates followed a similar trend. Meanwhile the US Gini coefficient rose from .415 in 1979 to .476 in 2012.[2] This implies that the top quintile pays a greater share of Federal taxes because they're proportionally richer than the other quintiles. The poor don't pay much Federal tax because you can't get blood from a stone.
[1] http://online.wsj.com/public/resources/documents/r42729_0917..., page 3
[2] https://www.citylab.com/life/2014/05/mapping-three-decades-i...
Second your graph shows rates for the top .1% and .01%. I was talking top quintile which you seemed to have forgotten plus you didn't challenge the data I provided.
[1] https://www.census.gov/data/tables/time-series/demo/income-p...
Income growth can definitely explain the increase in tax burden, but my point still stands, no? The tax burden is not shifting from the wealthy to the poor.
And if you look at the bottom quintile, their tax burden has fallen, even though income continues to rise.
Should think of the marginal utility of their funds. If a $20,000 a year person pays $5,000 - it's much worse than a $10,000,000 paying $100,000.
Top quintile pays an effective rate of over 30%.
To those who have much, more will be given...
How should I interpret that chart, considering things like wealth versus income? There's some sort of transition between those -- I would guess more wealth was held in non-taxed trusts or investments back then, compared to now? Does the estate tax change behavior?
I think the point is to look at how much of the government is paid for by the top quintile than the others, over time, compared to each group's wealth. Is that correct?
(I am not an economist, just have an amateur interest in complex systems.)
Actually the exact opposite is happening. The top quintile is pay a bigger share of taxes than before.[1] In 1960, the top quintile paid 56.5% of all federal tax revenue. In 2005 it was 69%.
Care to revise your position based on that?
[1]http://www.nbcnews.com/id/29861648/ns/politics-capitol_hill/... (table on right)