Require sterilization as a prerequisite to voluntarily receiving long-term welfare.
This will reduce crime and generational poverty and boost the general welfare, including health.
Something like that. And, more importantly, no non-citizens ever. As a condition of non-citizen getting care, they agree to deportation afterward because they are not able to support themselves. No exceptions. That would save billons every year. And get rid of unwanted non-citizens, illegal or otherwise.