It's not obvious at all; in fact the tax percentage is meaningless on its own. People get too hung up on tax rates instead of focusing on purchasing power and quality of life. It's almost like adding zeros to the currency. The only thing that matters is your purchasing power (which comes from your net income), not your gross income or what percentage tax that corresponded to. Like if (in today's economy) you pay me $10M/year and I have to pay 90% of that in taxes, I would happily work for you. If you pay me $10k/year, I wouldn't even work for you if my "tax" rate was -100%.
Is there a way to make the math work out? Honestly, I don't know. Maybe it's impossible, maybe it's practical, or maybe it would come with so much baggage that we'll prefer the status quo. What I do know is that the people who declare the answer is obvious consistently arrive at that conclusion by artificially constraining the problem in some way that is not implied by the premises, like "you can't raise taxes significantly", or "you can't touch defense spending", or "we won't decrease healthcare costs", or numerous other things.