I've known male OAPs on a darned sight less than £11 a week. Of course, 'when' (which you omitted) is essential to the argument.
The other point is that the OAP is purely based on the contributions, pure and simple - but, for those whose contributions have only bought £11 a week''s worth of old...
Not convinced by those graphs - appear to have some serious flaws. Starting at a date to suit its intentions - it was only in the 50s or 60s, after all, that more than 50% of the entire housing sector was owned by the occupier, and not rented - and then again home ownership shot up in the 1980s...
Not wanting in any way to get involved in whether or not young people have had it easy - or in what ways it might have been easier - but on a point of order has there ever been a time when large numbers of U30s owned their own property . Yes, I know some always have, through inheritance...