The large HAA company that I work for doesn't hire anyone part time. I don't always agree with it, but even a medic or nurse wanting to step down to part time they don't deal with it. I think there it little demand on the pilot end, also an HR nightmare. From a pilot perspective I wouldn't hire part time anyway. It feels far too much like someone needs a little extra retirement income while finding any excuse to turn down flights and show up ill prepared for check rides, and spread bad morale. I see it all the time with the "I just have a couple years left" guys. I'd rather a base out of service until we find a professional willing to work, than just fill a seat for operations purposes.