> Almost nobody chooses a cameraman, truck driver, or supermarket cashier jobs if they actually had a legitimate choice between that and a well paid tech job.

The world beyond a chair in front of a computer is a lot more interesting to most people. I know more than a few in tech who dream of having a job where they get to interact with reality in a more direct way. And I guarantee you if the pay was closer, you'd see a lot more people adjusting their lifestyle and ditching the tech grind.