There is a lot of supply, and a surfeit of postgraduate degrees in many fields where associate professor is a great job means the quality isn't bad.

An increase in supply would have to come from some innovation that enables really ramping up supply and competing against high quality traditional college education.

Don't look for demand to get slack, either. Lots of foreign demand at every level is out there and it isn't going to stop growing soon.

There is a lot of supply... and if there were more it would drive down prices.