The ability of more people to get housing earlier in their lives is only correlated with the growth in housing stock. If the housing stock is growing more slowly than the population then it's irrelevant if people manage to save more money towards it; that just increases the house prices for everyone. Conversely, if the housing stock is growing faster than the population growth then even a decreasing amount of disposable income wouldn't stop people moving into the vacant properties... the prices would all come down to match.
Of course this sounds ridiculous because in a normal market the supply of a good or service would increase if prices go up (positive price elasticity of supply, as the economists would say). But housing markets are often not like that, and they're certainly not like that in the UK suburbs (as I said, that's partly because of the green belt).
Of course this sounds ridiculous because in a normal market the supply of a good or service would increase if prices go up (positive price elasticity of supply, as the economists would say). But housing markets are often not like that, and they're certainly not like that in the UK suburbs (as I said, that's partly because of the green belt).