Yes that's a poor and hopefully temporary side effect - but it would get more people covered with medical benefits. It may also not be that bad en effect because unfair scheduling practices for the part time hires. The part-time scheduling is reported to take up essentially full time commitments to be on "standby" with poor stability in the scheduled times on/off. So if one wasn't instantly available to come off standby, one would get penalized - to avoid that, you couldn't take other part time work.