ok here are my objections......
we were given 3 days notice of the extended hours, so organising cover for the shifts and any associated childcare etc was a nightmare
the store (large non-food retailer) is given x amount of hours to contract and an overall payroll budget to pay for overtime, this is affected by sales as it's calculated as a percent to sales. Just because we are open for longer does not mean we have more money to spend on staff so taking someone on for the sunday shifts means someone else will lose hours
if staff are only working sundays they are incredibly difficult to train as they have 6 days inbetween shifts so give poor service
it doesn't matter what time you shut someone will always come in seconds before you close making you even later out (and for information, if a shop shuts at 6 is means the staff stop getting paid at 6 despite the fact they are expected to stay until all the customers are out, and the tills have been taken off and firedoors locked
sundays run with only 1 manager in a lot of stores. If they are open 9-6 it means the manager working 8-6.15 with no breaks as they can't leave the store when they are the only keyholder
you can opt out of sundays but this means you will lose those hours as they will still have to staff them -with someone else!
when we recruit the biggest number of applicants we get want mon-fri 10-2, or they will work saturdays but not sundays due to sports teams etc
when I worked in a shopping center we were inundated with weekend applicants so this is very much location specific
in theroy I work alternate weekends
in reality I have worked every weekend since April juggling the DCs between their dad (alternate weekends) and my parents who live an hour away
if I finish work at 4 on sundays it means I can pick the DCs up, eat with them, baths and ready for school at a reasonable time -if I finish after 6 I can't
I could pack my job in but it pays my bills and I would struggle to find another to cover my mortgage as employers don't see retail skills as transferable (despite the fact that I do stock accounts, invoicing, payroll, HR, auditing etc etc etc)