P.S. I think that employers are hiring temporary workers, not as much to just avoid Obamacare, but also because they don't have to offer any benefits at all, and don't have to give them 40 hours a week. The idea is that you can give work to a group of people that have one skill set you need at this point, and them let them go and hire another skill set that you may need later.
Funny, but I remember reading an article about 15 years ago, that predicted that people would all become "independent" contractors for their careers - responsible for their own health insurance, retirement planning, and moving from temporary job to temporary job. The point of the article was that "this will happen, get ready for it" - keep your skills updated and be ready for it.