1) Employer is not going to pay you more than he has to. Meaning, if he can find somebody to do the job equally well for less money, then you are replaced.
2) If your skills are such that some other employer would be willing to hire you away for more money, then you are going to say good bye unless he offers you what the market says you are worth. That's how you get a raise in real life.
3) If the job you are doing brings in less revenue than you are costing him, and he can't get anybody cheaper, then he's going to shut down that job. That might mean stopping to have a late shift, otherwise reducing business hours so that they're open just during peak times, or shutting down the business entirely.
A businessman creates a business so that HE can make money. Not for YOUR benefit. Paying you is only a means for him making money. Never forget that.
What the hypocrites that want to eliminate the minimum wage are saying is they want to keep the subsidizing the low end labor and profit from that. All that is leading us too is more public debt and socialism.
You make good points but are probably wasting your breath on central_va.
It is an obvious conclusion from your points, but you might have to spell it out for the simpletons... When the government steps in and starts trying to meddle in the basic interaction between employee and employer the repercussions these days are almost always negative for everyone.