I’d think that they’d at least try to be glorified recruiters first if it is the worst case. At best, staffing agencies would end up being more attentive to the people seeking work (than they already are) versus the agency’s clients.
I wouldn’t count them out immediately but they would have a harder time helping employers with those kind of requests.
Yes, companies could hire more full time personnel for their personnel dept. Oh, wait, that means another 0bamaCare policy. Well, they'll have to suck it up one way or the other ... for the good of the state.