This argument can easily be extended to people's actions in the bedroom when no money is being exchanged. They can lead to pregnancy, spread of STDs, violence..

This argument can easily be extended to people's actions in the bedroom when no money is being exchanged. They can lead to pregnancy, spread of STDs, violence... and yet, I imagine, almost everyone supporting the minimal wage would vehemently oppose regulation of sexual activities by, for example, only allowing married couples to engage in them. Right? No one here thinks that we should limit single motherhood by banning extramarital sexual relationships? Or the spread of HIV through anti-sodomy laws? EDIT: OK, maybe I didn't write that clearly but both low wages and sex can lead to negative externalities. Why one should be strictly regulated and the other protected from any regulation?