That doesn't happen, because other jobs are eliminated at the same time. Suppose you and others snapped up a million net new jobs within a few months and sent the unemployment rate skittering down toward 4.5 percent. More people at work produce more and spend more, boosting the economy. Wall Street would consider this a hostile attack on their interests, and the government would back them up. Without delving into an economics lesson, if unemployment drops below a certain rate, the economy is predicted to overheat.
Tight labor means means a seller's market, driving wages up, and sparking inflation.
To stay with the driving metaphor, an sharp drop in unemployment would cause inflation-spooked Alan Greenspan to jam the brake pedal with both feet as the economy flies through the windshield. He would like to pay you even less, but is prohibited by law. Think about that when he asks if you can close on prom night, or the Raiders - Bengals game, or your anniversary. Republicans and businessmen say that a higher minimum wage will force them to hire fewer people. I imagine most shopowners would prefer a Montana-style wage structure, where there's no fixed minimum, but a cop can cite you if your pay is unreasonably low.