I think the article misses a point about park sweeps. No one thinks this will "solve" homelessness. The public does not care. They simply want these people out of the parks. 
I'm all for an intensive effort to truly move the homeless to stable housing, but such an effort has to be paired with a reclaiming of PUBLIC space from being monopolized by a narrow demographic. 
And let's acknowledge that the homeless usually present with mental illness, substance abuse, or both. Who wants that in a neighbor? We are doing all involved a disservice to ignore the reality. 
Spend the money to solve the problem (rehab, mental health counseling, steady housing, etc.) but by all means sweep these people out of our parks and libraries. To do otherwise undermines any public support for anything homeless.