No, my point was that your cited data source shows that, as a % of GDP, income taxes are unchanged since the 1940s. This is because when you look at the taxes

No, my point was that your cited data source shows that, as a % of GDP, income taxes are unchanged since the 1940s. This is because when you look at the taxes actually paid, it evens out due to deductions, credits, changes to the brackets, etc. It's only if you look at statutory progressive rates that it appears that federal income taxes appear to be a larger % of US GDP.