I agree with pp that it's because more people are renting and gov't doesn't want to provide them with housing, so they'll have to work and pay rent.
Certain jobs (nursing, paramedic, teaching spring to mind but there are tons) are just not doable in your 70s.
Yet another annoying example of how the baby boomer generation got the spoils (no uni fees, cheap house prices, good pension schemes, ability to work and travel in the EU) and the drawbridge is being pulled up for everyone else.
At some point the younger generation, who can't afford to buy a house, who are still paying back student loans, who won't get a pension, are going to get seriously fucked off. Why should they bear all the brunt, always.