Revenue is about the same per capita over an extended period of time. It will go up and down with economic conditions, and economic conditions are still a bit down lately, so revenue will be as well until that has turned around. Studies have been done showing that despite historical tax rate changes, revenue generally stays in a similar range. You can cut taxes and increase growth a little, or you can raise certain taxes and divert resources to avoidance and paperwork, but it's really not that big of an impact. You have to have economic activity in order to tax it, unless we're going to switch to a model of confiscating based on saved wealth directly.
Government spending, on the other hand, has significantly increased. You can blame the war/terrorism funding, or the bailouts, or the wasteful spending to cronies of those in power, or increase entitlements for an aging population, but you can't deny that it's increased significantly, no matter how you want to measure it.
So the only really serious conversation to have about fixing debt/deficit issues is what you want to cut in terms of spending. If we could get the right-wing to agree to cut defense/anti-terrorism spending and the left-wing to cut environmental/wealth transfer boondoggles, and/or slightly increase the age for retirement for SS/Medicare, or cut the useless ACA, or whatever, even if overall only by 5-10% around current spending levels year-over-year it could be solved pretty quickly.
But there doesn't seem to be much interest in that sort of thing. People are more interested in trying to score political points.