In today's labor market, employers where workers have a regular 29.5 hours per week aren't really fond of being flexible enough on their hours to accommodate another part-time job.
Single women are much more expensive to insure than young single men. I imagine this will also play into hiring practices. Another case of obama hurts women.
Exactly. Being stuck in a single part-time job will condemn a lot of people to poverty and government dependency. There are a lot of hourly workers who can make enough money to live on if they can consistently get full-time hours, but not if they work under 30 hours a week. When they can't support themselves fully, they'll be looking to keep their income under whatever threshold allows them to qualify for government help to fill the gap: food stamps, housing assistance, etc. Or they will drop out of the workforce altogether.
Either way, the shrinking pool of people with full-time jobs will be stuck paying the bills for more unemployed and underemployed people.