Minimum wages decrease equality by taking the people whose labor is worth the least and making it worth nothing at all.

Suppose the minimum wage is $6/hour. A person whose labor is worth $7/hour in the absence of the minimum wage will find they can fetch near $7/hour in the market even with the minimum wage. Now suppose the minimum wage is raised to $8/hour. Now, the person whose labor was worth $7/hour will find that their labor is worth nothing at all. Those whose labor is worth more than the minimum wage are unaffected. They'll get jobs either way.

Minimum wage laws simply ensure that those whose labor is worth less than the minimum wage cannot get a job even if they would prefer to have it (if for no other reason than to gain experience, to keep their skills current, to have a reference for their next job, to make a little bit of extra cash, just to have something to do, and so on). To claim that overriding people's rational decisions somehow benefits them is absurd.