IT's right outside the window, it seems to me, though I'm optimistic that population growth will level off in a few years.

The other problem is economic - ownership doesn't expire so in a gerontocratic society the older members will by default end up holding more and more of the wealth.

Of course, one could argue that medical are in old age is a massive sink of wealth, and so anti-aging research has the possibility to mitigate that. But unless one proposes to make people immortal - which would entail massive social disruption - such advances are likely to just postpone those expenses.