There's a lot going on in this thread, and none of it is entirely correct.
There's a lot of bad employees, there's also plenty of bad employers. Employees often think they're worth more than they actually are, and employers are driven by a bottom line, not providing the best they can for their employees. Loyalty is dead, because employers have killed it. I've been at my current job for 5 years, and just by the numbers, I've cost myself money. I recently accepted another position starting next week, and my salary will jump 35%. My skills are the same, but employers have little desire to keep employees over the long haul.
There's lots of college graduates, but a scary amount of those college graduates took out loans to get degrees that are worth less than the money they were printed on. The government and private institutions have been largely reckless with the money they've lent students, and most students aren't financially smart enough to avoid the pitfalls that have been set up for them. For example, I work with a guy who graduated the year before me from the same school with the exact same degree. He graduated with $60k of student loans. I graduated with $15k. Why the difference? He was offered the money, and the school gives you the remaining balance of the loan once your tuition is paid for. Literally, he was getting thousands and thousands of dollars deposited into his account every semester. He's not alone.
We need fewer people going to some state school to get their B.A. in Public Speaking or Mass Communications or Gender Studies or *insert whatever is the most insane degree program you can think of that you can't imagine ever really exists but actually does*. These schools will take your money while knowing full well that your degree is going to be worthless. Instead, we need to normalize students going to trade schools. We need more electricians, plumbers, welders, carpenters, etc.
The "wage stagnation" is largely a myth- people make more than they did decades ago. However, what economists call "real wages"- your purchasing power, has remained largely the same, if not dropped, over the past 60 years.
No, flipping burgers isn't worth $15/hr. No matter how much you wish it was, it's simply not. Yes, there's a shortage of workers. That's not solely because of the wages, but rather because our government has established new programs that provide enough incentive to remain unemployed rather than taking a low skill/low pay job.
The "great resignation" is real, but it's being misunderstood. Yes, people are leaving their jobs at higher rates than ever. The numbers show that the vast majority of those people aren't leaving for unemployment, but rather taking higher paying opportunities (*reference the purchasing power above). Yes, there's a lot of need for low skill/low paying jobs, but that's a result of the draconian policies put in place at the start of the pandemic- shutting down restaurants and retail stores. Those employees were laid off, but programs such as the CARES act made sure than they didn't lose any money. In a lot of instances, those people were actually making more money unemployed. No, that's not a good thing. That's how you end up in the situation we're currently facing regarding inflation. Yes, those people aren't coming back to work despite some of those federal programs ending. It's too early to tell why, but maybe we don't have to look too far. Who wants to go back to work and earn less than they were while unemployed? The gamble they're playing is that businesses will cave to their wage demands. Those same people are also being hurt by inflation, which will only get worse when they cost of their output goes up because they're being paid more for the same job.
Sorry to ramble, but none of this is as black and white as some seem to think it is. We've got a real crisis on our hands, and it's not the result of any one thing. Rather it's the result of decades of issues that have compounded upon each other, such as telling kids that unless they go to school, they'll be poor the rest of their lives, but then not helping them understand what's actually worth taking out loans to study and what's not worth the time or investment.