the relationship between the two figures is that $2000/month is roughly the safe withdrawal rate for diverse $500k portfolio (ie, the most you can spend without risking that you use up the principal over several decades). if you use the almost all the returns from the nation's capital to pay out $2000/month, there isn't much growth to speak of. of course, it's sort of a naive analysis to treat a nation's wealth like a retirement account, but the idea clearly doesn't pass the "back of the napkin" test. there would have to be some powerful knock-on effects to make it halfway viable.