Define wealth though.
If someone earns an extra €100k, they’ll end up with €45-48k.
That’s theirs. If they invest it, they’ll pay tax at rates of 33-55% on any returns. If they pass it on to someone, they’ll lose 33% of it.
What are you suggesting that the State should do to that person’s €45-48? It has already been subject to a massive proportion of tax.
That €45-48 is still taxable though, no matter what you do with it. You can hold it in notes and coins to avoid tax, but if you 'use' it, it will be taxable. VAT, CGT, DIRT, CAT are likely to apply no matter what you do with it. I don't understand your point about it previously being subject to tax?