Problem is, if you pay them not to work, all there is to do is stay home and breed. And now you have five people to take care of instead of two.
You're such a long-term thinker.
"A new life awaits you in the Off-World colonies. The chance to begin again in a golden land of opportunity and adventure. New climate, recreational facilities.....absolutely free."
We should ram one of the ice moons of Saturn into Mars to kick-start a terraform.
People that say stuff like this sound like they subscribe to the Just World fallacy.
Whether your productivity is positive or negative doesn't depend on whether you are rich or poor.
There are plenty of rich people who could be pruned from the gene pool, and we'd all be better off for it, according to most prevailing value systems (not all).
It's certainly easier to get richer if you have positive productivity, but that's stochastic too.