Assume
0% below 1x GDP
10% between 1x and 2x GDP
20% between 2x and 4x GDP
40% between 4x and 8x GDP
60% between 8x and 16x GDP
80% between 16x and 32x GDP
90% above 64x GDP
100% above 128x GDP

I.e., you shouldn't make more than 256k/mo...

When the capital development of a country becomes a by-product of the activities of a casino, the job is likely to be ill-done. — John M. Keynes