For a charity shop to run efficiently, you need people. You need people to sort through the donations, price and steam the good clothing, research the bric a brac online so you're not putting out a gold bangle for £2, stock the shelves, operate the till, go through every item on the shop floor weekly to remove anything that's been there more than 2/3 weeks according to policy. And that's before all the other jobs in running a shop like cashing up, banking, recruiting new volunteers, training them, window displays, reporting figures to head office, dealing with emails, phone calls, social media and so on.
Volunteers are there by choice and in my experience some will pick and choose what they want to do. You've got Joan who only does the books and won't sort other donations, Mary who does the till on a Friday morning and won't ever switch days, and Bill who refuses to go on the till at all. Sue who can't lift anything heavy, Ann who doesn't like using the steamer, Peter who is only interested in cleaning the jewellery. It's not like a normal business where you just draw up a rota and tell people what they're doing. If they don't want to turn up, they don't. There is this perception that we're all standing around twiddling our thumbs doing very little whereas we are snowed under with stuff and not enough people to get it all done. Not enough RELIABLE, adult people who are prepared to come in week in, week out and get stuck in. Well intentioned 14 year olds doing their D of E who want to come 1 hour a week for 12 weeks are a total waste of time. And the manager wastes so much time training people on the till or giving them the health and safety briefing, then they leave.
Most charity shops have one paid member of staff. Many like the one I am currently helping in have nobody paid at all. The one paid member of staff is paid for 35 hours a week - or less if it's a smaller shop. Shop is open 9-5 Monday to Saturday, and maybe 4 hours on a Sunday. That's 52 hours a week. Because of lone working policies most charity shops will insist on 2 able bodied over 18s in the shop at any time.
Like i said, all the experts feel free to come and show us all how they could do it so much better. With limited resources, variable quality/quantity of stock and a volunteer "workforce".
Charity sector sales are way up on last year. Which kind of says people are finding things they are prepared to buy, at a price they are prepared to pay. Despite what some moaners on MN say.