Why is there a labor shortage today? Because a lot of people took that very same advice. My former employer downsized me back in '08. Things were tight around here, but he realized that he needed the skills I had after I left. He's now one of my clients. I never have a problem sending him my bill every month. Of course, he pays a lot more than he would had I been kept on the payroll, but the billable hours are less. I spun it around to several other clients as well. Rarely have to dress up for meetings, can often do my work in my robe and slippers. I can even swing having a housekeeper come in a few times a week instead of having to do it myself.
Too many people have gone this route, tired of the uncertainty of if they'll have a job tomorrow. The smart ones even have a nest egg set up for the eventual business downturn that is due to happen soon.
But for now, we have a labor shortage.