I'm looking at this from a different angle than most (or maybe all) of you.
When I lost my mum, as an only child I inherited her house.
Our DS and his fiancee (now wife) both wanted to live in our part of Cheshire, but were struggling to afford anything in a good area, so, problem solved, they're buying mum's house from me!
It's all been arranged legally, the house remains mine until paid off in full, which hopefully will be in about another eight years and then it's up to them to stay there, sell it, whatever they want, it will be theirs to do with as they wish!
They pay me an amount every month, equal to what they'd pay for a mortgage, minus interest, which helps them enormously.
I probably lost about fifty thousand by selling the house to them, as I let them have it at a much reduced price, but hey, he's our only child, so it's worth it.
It's working well for me too, because I know if I'd sold it, and had that amount of money in the bank in one go, I'd have gone on a silly spending spree and wasted a lot of it! The interest rate is so low that keeping the money in the bank wouldn't have been worth doing.
If my mum had lived, we could only have helped our DS with a small amount towards a deposit for a house, but this way, I get to see mum's house growing into a family home again (baby due in early August), our DS and DDiL live in a lovely area, and I have them living in the next road to me, so it's a win win, situation!
If parents are in a position to help their children, why shouldn't they? It has nothing to do with trying go keep house costs high, and everything to do with wanting our families to get on the property ladder.