It's not even that, because I believe the $90k figure is in ~2060 dollars, so it's closer to $60 a month relative to now.
I am not sure what article is being referred to, but often the comparison of lifetime earnings for a high school graduate vs. those of a college graduate does not reflect the whole picture.
For example, many high school graduates do continue their education in 2 year community college settings, and then get trained for the jobs they take for their lifetime. I would like to see if there is a study of the difference between CC grads and college grads.
I think to get a complete picture, that would be helpful to know.
And, it would make sense that for specialized fields like accounting, engineering, pharmacy, the lifetime salaries for the 4 year college grad would exceed,by well over $90,000, that for only the high school grad.
Not so sure about the disparity between the salaries for the average liberal arts major vs.the average high school grad.
In these times, there are not many unskilled jobs, so that even non-college grads, have to know how to operate a computer, and operate robotic machinery. So then, their salaries may reflect those enhanced skills.
A successful electrician, plumber, contractor can make as much as a college grad who majored in liberal arts and does not go further for advanced degrees or into professional school.
Even if he or she does go on for advanced schooling, or gets a corporate position, there is the real issue of company mergers or downsizing and age-related discrimination in the corporate world.
A skilled trades person can work on their own, unlike a corporate employee (college grad) who often is subject the whims of a profit at all costs manager, or a company that gets extinguished by leveraged buyouts from hedge fund companies, or gets pushed out by a younger employee so the company can save money and medical costs.
I am glad I am retired and don't have to deal with these issues.