We have 4-5x the normalized GDP per capita compared to the 1950s.
The amount of taxes we collect isn’t the problem. Excessive government spending and inflationary pressures on things like housing is (Which, btw seems to always go up regardless of what political side you want to point fingers at)
While the economic output per person has indeed increased 4-5x, the inflation adjusted median household income has only increased by 50% (1.5x). Government spending is not the issue here.
The things you mentioned are always a problem because even the far left in America is incredibly right-wing.