The reason behind full employment of programmers is actually pretty down to earth. Enrollment into CS programs dropped dramatically when the bubble burst, and

The reason behind full employment of programmers is actually pretty down to earth. Enrollment into CS programs dropped dramatically when the bubble burst, and has remained low to this day, even though the market recovered in only a couple of years after the crash. It's a matter of inertia, really: it takes a few years for people's perception of the job market to adjust and 4 more years to graduate.