If you think logically, it's obvious that RiteAid will have more tech help than Wags, and that's with the only known thing about them being their hours, not yet looking at reputation, management, etc
Given 2 hypothetical, neutral, faceless companies, one open 8-9 and the other 8-10 (most stores), if the pharmacy that's open 8-9 wants to do a similar number of scripts then it must schedule more help. One huge boon for working at RiteAid, better hours & more help, whatever their other qualities
Now, moving onto CVS, with their east coast plantation mentality and 12 hour, 14 hour shifts, we may guess the reason for WAGs chronic understaffing.
WAGs is the first pharmacy chain nationally, and CVS is competition. WAGs usually has 8 hour shifts with 2 hour overlap each day. Pharmacists are more expensive than techs. WAGs wants to have competitive salaries to retain quality personnel, so therefore they must pay their pharmacists and save money elsewhere i.e. tech hours
As an addendum: on the surface in and of itself, CVS 12-14 hour shift may be not so bad (though of course it is, this is just a thought experiment 😎), if the pharmacist can eat and focus and use the restroom and CVS surrounds them with cheaper tech help
Hope no trade secrets divulged 🙂