Some jobs are not meant to be full time. Full stop. An entry level burger flipper is not something one should be doing for their entire life. Master chef at a 5 star restaurant is a completely different level, (of training and pay). It is an entry level, no skill job. Do I appreciate it, yes. Does it deserve the same pay as an electrician, a plumber, a doctor, or even a drafter? All of those jobs take years of training and thus are paid accordingly. So all jobs are not equal and do not deserve equal pay. Be careful what you ask for. When governments make things equal they don't usual go up, (we won't all suddenly be making 6 figures), so say bye bye to your pay rate as an educated adult.
Greedy corporations - aren't nearly as greedy as you might think. Look at the profit margins of many of these companies. While to you it seems high, (guessing you have never own, run, or actually worked for a non-government entity in your adult life), you have to take into account risk, all costs from buildings to insurance to staffing, to highs and lows, (see Covid and the number of businesses that didn't make it because there was no margin for no income). Parents working 2 or 3 jobs are doing so to make life better for their kids and are probably doing so in an unskilled field. As they move into skilled labor that changes. If at the age of 50 someone is still working 3 unskilled jobs because they never progressed then we need to look at why because even a kid starting at Whataburger at 16 will move into a management position by 20 with continuous employment unless they really aren't qualified.
Inflation due to greed???? My goodness did you take an economics class? Huge influx of available cash, especially because of government spending hits very low availability of raw materials and you have a massive imbalance of supply and demand. It isn't greed when a company can't make something to put on the shelves. And it isn't greed to think that the price of something might go up when you put $1,200 worth of fuel in a semi tractor to drive those goods across the country.