Yes, clearly.
Eventually in our system you will reach a point where the percent of people paying cannot meet the amount of revenue needed, or should I say will not? If you reach the point that you must tax someone at an exorbitant rate to sustain the revenue, even though the revenue is there the system is still unsustainable.
Let me state this another way.
First, let's assume that the total cost/need of the collective (including governmetn operation expenses) is $5 trillion per year ($5T/yr).
Second, let's make the assumption that a single person makes $5T/yr. No one else has any income at all.
Third, let's assume that the government taxes income at 100%.
If the government is collecting all of the tax revenue from that individual, then technically, the system is sustainable. As long as the individual continues to work, collect, and then pay out, and not increased cost impacts the government's expenses, then the system still works. If the costs increase over the amount collected, or anything else that makes revenue be less than what is being spent, then the budget starts into deficit spending. Technically, that is still sustainable as long as we have credit being extended to the government.
"Racing is life. Anything before or after is just waiting." - Steve McQueen
I've got a really crazy idea.......
lets create a currency... make it good for everything. Then have it to where people can do whatever they want to get this currency and trade it for anything they want. So that whether you want to pick vegetables and sell them for currency, or get paid to provide labor for currency... ect ect...
That way people can go out into the world and acquire their own currency rather than relying on the government to hand it out???
I know that's a crazy concept..... but i think it could work.