Can prison litter picking solve litter?

1) What kind of claim is this?

This is a policy solution claim.

2) What context is assumed or missing?

The scale of littering and prison labour capacity is not described.

3) What has to be true for this to work?

Prisoner labour would need to match the scale and repeat rate of litter.

4) When would this not hold?

The claim weakens if littering continues faster than it is removed.

5) What follows if we accept it?

The focus shifts toward cleanup rather than prevention.