Or, look at the education system in Washington DC- highest expenditure per pupil, with sub-par results.
Giving everyone for an undefined, but definitely finte, period a lump sum of cash will certainly help a small number of people. Others will not leverage the windfall and will once again be destitute when the charity ends.
What do we do then? I would rather have a more systematic solution [edit: set of solutions] to help people whenever they are in need, rather than a blanket solution.
Some arguments I've seen boil down to "well, let's do both!" at which point all they are arguing for is sticking with the same broken system, but throwing more money on top of it. It doesn't change the fact that what we have isn't working, and isn't going to be solved by further crippling the middle class (since "the rich" typically adjust income strategies whenever taxes change, they're not going to be affected in the way "tax the rich" folk expect).