You are not entitled to a successful business. If you have to pay substandard wages in order to be profitable then your setup is flawed off GP.
You are technically correct and that is at the heart of capitalism. Nobody is entitled to jack. But that's not how the real exercised world works. Small businesses gotta have a place, too. $10/hr is a fair compromise. It's far from incredible.
But if you shoot it to $15/hr, the small businesses close and the big businesses make folks part time. Or cut overtime. Or make employees pay 100% of their health care costs.
I'd love to see a fair application of $15/hr across the board but it isn't that simple.
I'd love to hear a workable solution if you have one.