Minimum wage raises occur not to help people have more, just to maintain a standard of living.
I don't think that's the case. I think it's one of those issues of "fairness." I think the minimum wage law is perceived (by some) to be the government protecting the little guy from the corporation who would like nothing more than to basically enslave their workers with a $1 per hour wage. As i alluded to earlier, that's only really possible if all the companies that sell a product or service collude to make it happen.
Corporations, companies, business, whatever not only have to be competitive with the product or service they sell but they also have to be competitive with the wages/salaries they offer to their employees in order to get good people to work for them (or any people are all).