You're looking at things from the viewpoint of society. There your argument makes sense -- of course "people" will continue to work. But that argument, that we'll just continue to work on things higher up Maslow's hierarchy, doesn't hold for individuals who don't hold an ownership stake in these technological advances. Robot Mega Corp and it's owners have no need for your grandmother's scarf, so what is she going to provide in trade for her more basic needs? Not having a job could be a real problem for her.

Incidentally, minimums, where earnings less than $X are increased to $X, are terrible and break incentives near the minimum. Much better are base incomes, guaranteed uniformly to even the wealthy.