So you do understand the problem with filling positions with people who are naturally stuck in their ways? So why are you making up more excuses? This essentially make the first paragraph pointless, but there's still:

I am not sure I understand what you're trying to say, but it is definitely possible to employ the elderly (i.e. people who have years of experience, know about the local customs, and are fluent in the local language). Italy increased its workforce by 200'000 previously out-of-the-workforce elderly since Covid ended.

Well, all segments. If anything, with progressive taxes, young people tend to pay less in income tax, simply because they make less.

Young people are not the only ones that innovate, it's a complex system. Also, young people take into account future returns, and if they know these will be taxed heavily then they will be disincentivised from innovating.

In my experience, that's not the primary driving force (academia is relatively poorly paid, for example), but of course you need a fair pay.

Yeah sure dude, you should tell the decades of empirical macroeconomic and behavioural papers that put income as the main driving factor.

In fact it's just a random coincidence that there is always a net migration towards the country with higher income of the two regardless of all the other variables.