Also depends on how you split it. I'd wager a lot of metropolitan areas are over already. Smaller cities are close to the maximum, but most people in the middle class or lower will feel it is way over already simply due to the cost of things.

There are quite a few fields you could at least slash in half overnight too. Bureaucracy is one: here (small European country) we have way too many managers and people that are only there to move boxes around and cause communication overhead to explode, offering practically no benefit whatsoever.