[sullivantrevor]

My solution is to pay them to pick up trash. Those that do are housed for free.

[MivLives]

That'd work great until someone realizes there's all these bins of precollected trash all over the place. Perverse incentives.

[6nf]

Assign an area to each person and that person has to ensure it stays clean. Don't pay by the pound of trash collected, pay by the area kept clean.