I'm not a pharmacist but I heard this the other day.

Pharmacy students with long-term, part-time employment with Walgreen's were offered full-time employment on completion of their degree. If they accepted, then all was well. Some didn't, for any number of reasons. Some wanted to continue to work part-time (for whatever reason). Others wanted to take a year to do a residency to enhance their qualifications. If they didn't accept the offer or didn't respond to the offer (thinking that the status quo would be okay or that they could discuss the options later), found out when they went to pick up their checks that they were fired. Summarily. On the spot. Don't show up next week. The past few years - who cares.

It seems there's something of an equilibrium now in this field, enough so that it has become a buyer's/employer's market. I don't know how many people were affected by this, and the ones I heard about found jobs pretty quickly, but they were (I love this Britishism) gobsmacked by the attitude.