[irrational]

The bottom 10% are usually those with disabilities like autism. Many of them really aren't capable of getting higher education. I have a 21 year old son with autism that has never even learned the multiplication tables (as a single example) despite our spending tens of thousands of dollars on private tutoring and other training outside of his schooling. He works a low level job at the airport that he enjoys. But, realistically, it is at the upper limits of his abilities. He is far far away from being a lone case. I really don't think many of the bottom 10% can be trained into higher value jobs.