You mean that people pop kids so that those kids would feel obliged to take care of them when they're old? Yeah, that's one legitimate retirement strategy. It's very popular in poor countries e.g. ex-USSR where I'm from.
Personally I'm more of a fan of US-style self-made retirement. It's easily possibly working in tech in the US, a 10 year career basically guarantees you financial independence here barring any major set back (like divorce). But not so in Germany and much of Europe.
> 2. home ownership is very low
Isn't that roughly same as saying people aren't wealthy enough to afford one? So if you "control" for this factor, you're just selecting the richer subset of people.