You seem to have suggested that there are legitimate reasons for someone to buy a smart phone or large television using government benefits. If this is not what you meant, then kindly clarify.
The worst that happens is someone has more than they need. And then what happens?
One of two things:
1: It sits in the bank, where it's lent out for investment
2: It's spent, possibly on something optional but still legitimately useful and non-frivolous, in which case it flows back out into the economy
I don't see a bad outcome. The vast majority of people want to have the self-esteem boost of fulfilling employment, and will seek it out once they're not stuck in the welfare trap. There's even a solid chance this will bring civilization to a point where no one needs a minimum income.
One of two things:
1: It sits in the bank, where it's lent out for investment
2: It's spent, possibly on something optional but still legitimately useful and non-frivolous, in which case it flows back out into the economy
I don't see a bad outcome..!
I'm probably just preaching to the choir, so you can have the last word if you want it.
The problem with your suggestion is that it would necessarily create runaway inflation, because there's no way to square that payout with government tax income.
You can have redistribution of wealth without runaway inflation, there are a number of existence proofs of this.