[kozd]

Not agreeing or disagreeing with your larger point but garbage picking is an interesting example. Aren't there folks who volunteer to pick up trash/litter on the side of the road and in parks? There's definitely an incentive (maintaining your community and other emotional/less-tangible benefits of volunteering) but it's not quite being payed to do it.

[mminer237]

I've seen groups "sponsor" roads where they pick up the trash for a sign of appreciation/advertisement from the state. But pickup up a few discarded cups in nature is a lot different than picking up residential or commercial garbage, especially on the scale of a city.