$2m is a top end superannuation retirement fund any ordinary mortal could aspire to. After $1.6m in Australia you can't contribute more in the low tax regime.

I'm not saying it isn't a shit tonne of money but $8b is more like obscene money, lots and lots of ordinary people retire with $2m between a couple. Nothing like half , a top cohort of the retirement pool, but I know several (I'm not one btw)

If he really did give it away and there isn't some cunning plan, good on him.