I'm one on the legions of PT faculty at one of these colleges.  For me it works because I'm semi-retied after a 35-yr career in industry, including time as a manager in a large manufacturing operation.  Most of the rest of the PT are however quite desperate and barely making ends meet with young families.  The trend now at the colleges is to higher younger people who have lots of education but little in the way of industrial/business experience over people such as myself with a lifetime of experience in addition to trades/technology education.

I would say that there are four big problems trending there:
1)  Huge and uncontrolled growth in administration numbers (not just high wages).
2) The impact and additional costs associated with meeting all of the requirements of the AODA act.  (1/6 students now have a disability!)
3)  Students graduating from the secondary system who are essentially illiterate and innumerate.
4) The desperate attempt to cover everything up using foreign students