A year of technical school cost me $1,200 in 1974...
Around $7,000 in today's money.
Today that same school is 10K a year plus books. That was 50 years ago but at the same time, people graduating from that school now are not making 100K to start either which would equate to a perfect ratio of cost to result. The difference, there was no public funding for college. My night job and my parents came up with the coin and I lived at home.