Federal receipts as a percentage of GDP haven't meaningfully changed since WWII. (Which means that they've only gone up in real dollars per capita, because GDP per capita has increased.)

Yeah so taxes have gone down. If you measure taxes with real metrics they've gone down to their lowest level ever.

What are you talking about? As a percentage of GDP, federal taxes have been the same since the 1940s. But real GDP per capita has increased, so real taxes per capita have increased.

And before the 1940s, federal taxes were dramatically lower.