The real question would be "inflation adjusted per-capita tax receipts over time" but a mid-work googling didn't turn up anything promising; that being said from the above graph _and_ the knowledge that inflation is increasing, your statement doesn't seem to mesh. Feel free to point out if I was really thick and got the wrong data or something.

[0]https://fred.stlouisfed.org/series/W006RC1Q027SBEA