Entry level / general tech / few day trainable skill jobs are shrinking.

The VERY entry level clerical jobs are automated out of existance. I've been doing that for years, which means fewer people get a lot more work done. I've just spend 90 minutes writing a Perl script that automates 2 full time jobs out of existance. Yup, I'm scum.

Entry level factory jobs are either mechanized or moved off-shore. Or both.

So, there are more people available at that level, which depresses wages for anyone left still employed.

Executive / management / very specialized skillset demands are growing. The pool of people that reach this level seems stagnant, which means really good people are always in demand and command a serious salary.