"Sounds like a great idea when you can't afford to buy in the catchment of a naice school, despite both parents working FT. Turn your argument on its head, why should we be stuck with the school that isn't good enough for your kids?"..
First- what is a school? It's not actually a building, it's a group of humans; governors, teachers, parents, children. A good school is one that takes its intake and, for the bright, keeps them performing, for the less bright- well, actually yes, keeps them performing (like my comp does as DS2 is a B/C student at best). All this can be achieved far more easily when you have the Japanese model of the 3 legged stool in place: Teacher/parent/child. All on-side. If one falls over, the model fails.
I am glad that I have a) been able to (joint income £50k) and b) have moved into the 3 legged stool catchment (look THAT up on OFSTED!).
So, if you have a 'good' school, what happens when you increase, widen, manipulate its intake randomly? Remember, the bricks and mortar haven't transmogrified. But maybe the ethos has?! The intake has? The value placed on education by its intake's parents has?
I would beg to challenge those who have suggested that I think it's impossible to get a 'good' education from a school in a less leafy suburb- but it's potentially harder when statistically you're far more likely to have to deal with The Disruptive and Disengaged in a 'less leafy suburb'.
You know, the one thing that strikes me in all the replies this post has accumulated- no one even addresses the existence of private schools whose DC sweep the vast majority of the 'good' jobs! Why do we want all our state educated DC to wade through the proletariat morass of bog-standard, 'levelled' education, 'levelled' by lotteries and fair banding (and by that possibly destroying our 'good' state schools) whilst a gilded 7% waltz life's glittering prizes, laughing at us as they go?
"Do kids from less leafy schools stand no chance of getting good jobs then? "- I haven't said that but yes, your DC's chances of getting a good (your usage) job are reduced if they end up in a sub-standard school.
The point that has been lost here is that can it not be seen that this 'policy' could well have the effect of making sure no pesky prole DC will compete with the golden youth of the Publics and privates? No one can do anything to attempt to ensure their DC doesn't end up in a dangerous, failing, shoddy comp 10 miles away? That you'd have no chance of doing something towards choosing a school that fits with your DC and your values??
Why do you seek that? In a misguided attempt at 'levelling' a deeply skewed field? BUT one you can seek to improve upon?