OK, it is HR 2811 the "Limit, Save, Grow" act, what a crock of shit. And sorry, but you need to look at the graph again. The top line has a high point of almost 70% during the Great Depression, was only slightly under 50% one year during the entire decade of the 50's, was as low as almost 30% during Bush Jr.'s administration, and the end of the graph puts it at 40%. Sorry, but that is a variance of off almost 40 percentage points, and 40% is not "roughly the same" as 50%.
And yes, the Social Security tax has increased, quite substantially since the 1950's, and who the hell pays the majority of Social Security taxes? It ain't the wealthy, that is for damn sure. And that increasing Social Security tax is a big reason for the twenty percent decline in the percentage of income paid in total taxes by the wealthy indicated in your chart.
Look, let's get something clear here. The statement, "The top earners in this country have, and continue to contribute, the most in tax revenue in this country", is meaningless without context. Of course they contribute the most revenue, THEY MAKE THE MOST MONEY.
The richest one percent earn about 21 percent of the income and pay 24 percent of the taxes:
A misleading conservative talking point that refuses to die.
nymag.com
That paints a very different picture doesn't it. WTF--one percent of the population earns more than one dollar out of every five total dollars earned, and they only pay one dollar out of every four in taxes? WTF? As the article stated, that is barely progressive. I mean they are garnishing an inordinate amount of the total income ON THE CHEAP. To facilitate competition, encourage investment, and rectify the continued decline of the earning power of the middle class and outright degradation of the lower class, the wealthy MUST pay a higher marginal tax rate. When that happens, they will find that their share of the total tax burden will DECLINE. I mean to make the statement you made, and earn less than a million dollars a year, indicates what a fool you are, a useful idiot. Because make no mistake about, the top one percent, they LIKE the way things are.