Job openings that Americans can't fill

Reuters has an article that points out the availability of quite a few well-paying job opportunities that remain open for lack of qualified Americans.

Too few college students pursue the studies they need to fill the available jobs:

Math, engineering, technology and computer science students accounted for about 11.1 percent of college graduates in 1980, according to government data. That share dropped to about 8.9 percent in 2009.

Whose fault is that?

Vocational education (presumably referring to the secondary school level and perhaps also at the technical/community college level, doesn’t teach what is needed to the students who choose to pursue this type of education:

"Often people say we do have vocational training, but it's geared toward yesterday's technology and yesterday's job opportunities," said ATS's Owens. "I am not sure the educators are on the mark with what exactly needs to be taught for today's environment."

Whose fault is that?

If employers know what knowledge job applicants need to be successful, what is keeping them from informing the students and the public school administrators and faculty?

If the faculty and administrators of our schools know what is needed, do they make reasonable efforts to inform the students?

If the students have this information available to them but still choose to pursue studies that do not qualify them to perform the available jobs, then isn’t it the fault of the students when they have poor job prospects?