...and demand full time employment.
How does one "demand" full time employment? Can I demand that you provide me with a full time job?
The root problem is that we have pushed more and more social responsibilities and costs onto employers. If I hire someone to drive a truck, why should I suddenly be responsible for his medical care? If most people swap jobs every few years, does it really make sense for employers to be responsible for their retirement savings?
In Maoist China, each factory ran a school for the children of their workers. If you changed jobs, your kids had to switch to a different school. That seems crazy, but employer provided medical care, and changing doctors when you change jobs, is just as silly. The only difference is that we are used to it.