10 years of covering 100% of spending? That sounds like a really sweet deal to me, and more than enough to invest into the nation enough to go back to a balanced budget in that time frame.
I mean, try it with yourself. Imagine that you take your current salary, keep it for 10 years, and have 100% of your spending covered? How life changing would that be to you? Probably a lot.
...for 10 years. After that, you're back in the hole that you were in before, but without anything to draw on. They're currently taking in the equivalent of $500 billion but spending $1.8 trillion, with a GDP of $3 trillion.
Understand that the non-wealthy wouldn't get anything new, it would just be a continuance of their current services and benefits. They've have 10 years to increase their GDP by 50% to get the tax revenue to get to a balanced budget. That's simply not happening without obscene inflation, with the corresponding increase in government spending on goods and services, keeping them out of whack.
I mean, try it with yourself. Imagine that you take your current salary, keep it for 10 years, and have 100% of your spending covered? How life changing would that be to you? Probably a lot.