- the individual income tax were the sole means of funding the government
Considering how much corporate welfare the government hands out, and the trajectory that said corporate welfare is taking, we are not far from the individual income tax being the sole fiscal source for the federal budget.
- government were run deficit-free, via proper budgets submitted in a timely way, and not endless borrowing
What does that matter in this case? I'm only comparing where money comes from to where it goes - geographically. Hell if Texas would finally just secede from the union the federal budget would get a whole lot better right away as they take a lot more money than they contribute (although then the new US would have a different immigration problem to deal with as people would be leaving Texas to come to a first-world country).