I don’t have children but I do understand why some parents have to do this, when they have multiple small children the only way they can shop is to utilise the trolley basket, or maybe you think they shouldn’t be allowed to shop in supermarkets. Your concern should also include the older generation who put their outside trolleys inside the supermarket trolley, I’ve never seen anyone ever clean the wheels prior, and I bet they’re dirtier then kids shoes, shoes get changed every few months while those trolleys may very well have been going for years.
There you go you’ve got rid of 2 groups of shoppers, lone parents with multiple children and elderly ladies who need help getting their shopping home.