Here's the problem with most of the assumptions that are occurring here.  For one, we already give money to people - link cards etc.  So why isn't that working???
This experiment was a one time lump sum.  
Once you spend it, you're done.  You're back on the street, homeless, if you didn't make good use of it.  And you may never have another shot.
I would support that for all entitlement programs.
Hell, make it $25,000.  Ok, we see you have had no income for X amount of time, you have no assets, and you've been living on the street for X+ years.  
Fine, here's $25k.  You're on your own now.  You can't get 25k again for 25 years.  But you can do whatever you want with that 25k.
Yep, I would support that, absolutely.
However, if you are trying to use that to mean a permanent monthly stipend - nope, that is not what that experiment showed.  That's what we have now and it does not work.