The reason Springfield never increase Minium wage because due to a lack of fundings and their school system barley gets an upgrade. Marge has work in various jobs but didn't make enough money because Springfield don't get part time workers good pay because Mayor Quimby is a lazy democrat who doesn't really care about handling the towns budget over dumb things even their own bosses' hogs everybody's money so this is why Springfield is still paying Five Dollars an jour for Minium Wages, even exciting and cool jobs don't get them paid enough so that's the reason why there only minor characters and rarely amount of random people living in Springfield in 2024.