You need to educate yourself on the monetary system. Taxes do not necessarily fund government at the local level. Non-convertable floating fx monetary regimes are self-funding. Its kind of like saying where does the score-keeper at the basketball game get points to put on the score board ? Can he run out ?
Inflation is the constraint, not solvency. We need to find the right number between 0 and 10^10 but we are not trying to do that and so we're becoming like Japan.