Molly, I believe that having a 2 tier system means that those using private schools know that their children are going to do well. Unless they have just dumped them at Lowood or Salem House and never visited, they will be at parents’ evenings and so on, and are able to insist on getting their money’s worth or take them out and send them elsewhere.
Everyone else gets a lottery ticket. Yes, many middle class parents will try to use the best state schools, but that doesn’t always work either. The school near me has a very good reputation. Like many ‘small’ towns, ours is getting bigger, with housing being built on the outskirts, and as with many other areas the infrastructure is not being put in to cope. As a result people paying ££££ for a house supposedly ‘in’ Hometown, described on the builders’ literature as having excellent schools, are finding that there are no places and their children have to go to much less well-achieving schools in neighbouring towns. They are up in arms, but there is nothing they can do about it, unless they can find the money on top of the huge mortgages that they thought would ensure them a place locally.
If all parents knew that they might have to use a second (or third) choice of school, then of course they would push for all state schools to be better - some out of altruism and some because it might affect their children if they had to use them. Instead the only people who get real choice are those who pay for it, and not everyone can.