They don’t make retailers work. Most retail staff want to work on a Sunday.
If only this were true
. My DH works every Sunday. There is no Sunday premium any more thanks to this idea that it's a normal day. He could opt out, but they get around that by saying he won't get the hours on another day, so he just loses 20% of his pay.
When Sunday trading came in they could have protected full time retail staff by making a requirement that shops had to have separate Sunday staff who didn't work during the week. That would have suited people looking for part time jobs, like students and mums. But they didn't.
Every Bank Holiday when everyone else is out -shopping- with their family, every Easter, Christmas Eve, Boxing Day, DH is at work. Unlike nurses, fireman and other essential workers he is neither saving lives, nor being paid a decent salary, so there is really no need for it.
DH can't get another job after 30+ years in retail, so gets his weekend when the rest of the family is at work/school. But just so long as you lot don't have to be bored on Sunday that's ok 