Minimum wage boosts efficiency by pulling workers out of untaxed leisure.
In an economy with a tax on labor earnings, having a slightly higher minimum wage in one sector can actually make things more efficient. This higher minimum wage attracts better workers to that sector, while most displaced workers find jobs in other sectors, increasing overall employment. This shift from leisure to work doesn't really hurt efficiency, and it also brings in more tax revenue. So, having a slightly higher minimum wage can help get more people working and improve efficiency in the economy.