We'll see just how long that pay "differential" continues. Counterpoint from another forum:
"How the educational chain is broken: None of my cousins' kids is going to college
"My dad was a metallurgist, his father was a tool and die maker. Maternal grandfather was an architect. I have a PhD in EE [electrical engineering] from the University of Michigan. All of my Aunts and Uncles have university educations. My sister has a degree in Eastern European studies from U of M.
"My one cousin has a PhD in Physics from UCSD [University of California, San Diego], the other has a PhD from MIT [Massachusetts Institute of Technology] and a MD. Both of them have two children each, aged 18-21. All of them have given up on college without even trying. The youngest really made me mad. Great HS [high school] grades, lots of activities that look good on a U [university] application, etc. Was always very interested in science and computers, had a computer and did a great deal of programming, used to ask me lots of questions about microchip design, etc. When I talked to him tihs time last year he wanted to get a PhD in engineering. Now he is not going to college. Hasn't taken the SAT [Scholastic Aptitude Test used for college admission], completely gave up. He is graduating in the spring and it is too late to apply anywhere decent for the fall.
"Want to know why? One word right from his lips: 'OUTSOURCING'."
In other forums I'm seeing where salaries for engineering and science graduates in the US are declining precipitously, thanks to H1-B visas and outsourcing. A number of these people are unemployed in their fields. The secret that is beginning to reveal itself is that there is an absolute glut of people with college degrees in the US job market now, in all fields and majors.
That pay gap won't stay for long. What the typical college graduate earns will come down over the next several years, especially when accounting for the expense of college loans. Wait and see. If you're making $30K a year in a job that paid $60K 10 years ago, but your college loan repayments leave you with less take-home pay than someone with just a high school diploma who makes $20K, are you really better off? And if your income is not likely to go up that much in the future because of economic conditions, then what's the point of the degree?
Also, the forum that The Critic links to has posters who mention that it is more likely that those going to college are more motivated or come from higher-income families, which would have helped their future salaries anyway.
We're heading for troubling times. I don't like what I see.