I think that's a good point that we definitely need to consider. It seems to me that an alternate interpretation could be that: I would have guessed that low

I think that's a good point that we definitely need to consider. It seems to me that an alternate interpretation could be that: I would have guessed that low paid jobs were already dominated by large corporations (however I do not have data to back this up one way or the other), it seems that small businesses are at least surviving (even if they were hurt somewhat), and small businesses can't compete on economy of scale so it would make sense for them to hire more skilled employees to compete on quality. In this case maybe higher minimum wages would still be a net good?