It strikes me how the elites in Western societies can engage in reckless social experiments like, say, allowing massive immigration of people from incompatible cultures (ripped from the headlines), without thinking ahead to possible consequences. Yet bring up the prospect of radical life extension for the native people already in these countries, and the intellectuals in these elites wring their hands and invoke precautionary principle-style reasoning against doing anything about the current life expectancy because of allegedly dire social consequences. Seems like they have their priorities backwards.

Well, unless radical life extension of the native population interferes with the immigration project's real goal of replacing the natives demographically with more tractable people. You need the natives to die on schedule for that to work on the time scale you want. But that explanation sounds like a stretch.