You're conveniently ignoring the fact that, of that 25%, some pensioners have never owned their own home and will never own their own home. There are poor people in every demographic.
There are also Tory voters and Brexit voters in every demographic. Statistically, a pensioner might be more likely to have voted for the tories / Brexit, but by no means all of them voted that way, and to blame all pensioners for the poor voting choices of some is just lazy and ageist.
Statistically, it's people with poor levels of educational attainment who voted for Brexit too, but you wouldn't try to punish that demographic by withdrawing their support, would you? That would only perpetuate the problem.
But you'll never find understanding if you aren't open to it.