[duxut_staglatz]

This is especially at the world stage. In a zero-sum economy, either some countries are left in an awful state of poverty for ever (no growth, same distribution of income) or people from rich countries must significantly decrease their consumption (no growth, equalization of income).

For reference, the average world GDP is about US$17,300.

At the OECD tax-to-GDP average rate, about $6000 would be spent through public institutions (i.e. taxes and public services). So that leaves about $11500 for both consumption and maintaining the capital stock.

The consumption of fixed capital is about 15% of GDP per year, so that leaves about $9775 a year, or $815 per month to consume stuff.