I think it's a law that if you fund something you get more of it. Serious discussion of safety nets, etc. already assumes some parasite response from the "ecosystem," takes it into account, and argues safety nets are still a good thing on net.
I think "unintended consequences" is a better analysis framework than "parasite response from the ecosystem".
And speaking of, there is a recent paper discussed on MR which claims to show how safety nets drive down the decline in labor force participation and, in particular, that "the Clinton-era welfare reforms lowered the incentive to work".
Another month, another rationality quotes thread. The rules are: