This would be one of the few effective ways to address the problem.
This world and a very good portion of the people in it are driven by greed, no not even greed, but need. To get people to put in hard work persistently one first needs something that would drive them on-wards.
Hope.
There would be many for which this could be life changing for them, a chance for redemption, or even just their first chance.
Plus, even I would be willing to spend time each day cleaning and improving my community if I was earning crypto doing so, let alone those in more difficult circumstances.