I agree with everything you said, but I think it's also a fairly low stakes experiment that might even be worth trying, and the real test of his competence as mayor is how quickly he realizes it that it won't work and shuts it down, rather than doubling or tripling down on it. Sometimes it's worth it to just take your best shot at implementing a probably bad but popular idea, as long as the consequences for failure are not too harsh.

There's a version of this, I think, that _doesn't_ fail, where they give up selling below cost and focus on setting up ABC-like grocery stores in "food deserts" that sell staple goods that bodegas don't carry.