That's always the question isn't it. It can have both pros and cons. For the employers this could actually be the biggest dilemma. Employers would have to spend more on personell costs after all, and thus production could become more expensive. This can sometimes also translate into the prices in stores.
BUT, for the employers and the economy as awhole there are also big pros. The more money people earn, the more money they are also willing to spend, the more money they are also willing to spend. In Dutch we call that "koopkracht" which literally translates to "buy power". A high "koopkracht" can really stimulate the economy. The more money moves the better it normally is for the economy. Of course, since economy is nothing more but how humans behave based on situations, nothing is written in stone, but in most situations, that is what it comes down to. And when more people buy what companies offer, the more money they make in the end. This is a bit of the irony in how a tiny bit of socialist thinking may have big positive results for capitalism in the end.
Now this is a bit of hypothesis, since there are a lot of factors playing a role, and I said it before, especially when it comes to economy, which is basically just mass-psychology with money, nothing is written in stone. And there are also things like inflation and so on, and high salaries alone do not stimulate "buy power", as you also need an answer to how to deal with unemployed people and good help organizations for dealing with huge debts and so on, so just raising minimum wages is actually the tip of the iceberg for a grand effect. Yet in theory my story above should normally apply.