Do you not buy into the law of supply and demand either? What would happen if we made the minimum wage $20/hour?
There is the optimum minimum wage. $7/h is too low in most of the country, $20/h is too high. Same like with the Fed interest rate, sometimes it is better for the economy to raise it, but it does not mean that excessive raise is good.
When you drive the car below the speed limit and other drivers get upset with you, would you tell them that since driving 40 miles/h faster is too much so you will NOT increase the speed 10 miles/h?
Let's just make it $200/hour and everyone will be rich!!! Poverty wiped out overnight and everyone will have their own beach house.