“LIKE ENDLESS JURY DUTY:” Virginia Postrel: Why Being A Part-Time Worker Is Miserable. “Scheduling software now lets employers constantly optimize who’s working, better balancing labor costs and likely demand. The process demands enormous flexibility from part-time workers, sometimes requiring them to be on call all the time without knowing when they’ll work or how much they’ll earn. That puts the kibosh on the age-old strategy of working two or more part-time jobs to make ends meet.”