Canada

I'd posit that a point you're missing under "We need" is "to tax the rich more to pay for the services and supports needed to manage the number of immigrants we plan to build.

You're right about immigration, but the problem, like anything our governments (LPC or CPC) do is that they'll do half the solution; the easy, cheap part (immigration, decriminalizing drugs, setting healthcare and education standards) but not the hard and expensive part (building infrastructure, providing treatment and housing-first at scale, actually spending money on teachers, doctors and/or nurses), and the reason they do the cheap part is they're ideologically unable to ask the rich to make do with less.

Hang on, your solution is to raise the retirement age at a time when wages are actively being suppressed across multiple sectors because there are too many people competing for the same jobs?

Let's revisit that when applicants for near-minimum wage unskilled labour jobs aren't lining up around the block (virtually and sometimes physically) for a single opening.

Part of the issue with raising retirement age, though, is that you can only go so far before the majority of people are unfit to work. Things like osteoarthritis have a much larger effect on your ability to work than they do on your life expectancy. Plus, the burden of continuing to work disproportionately falls on poor people whose work is more physical—well-educated people with desk jobs usually earn more money, have somewhat better savings, and can thus afford to retire a few years before their government pension kicks in.