If [...] youre not trying to save them, what does it matter?

That's the problem I'm currently addressing, isn't it?

If you are trying to save youre not keeping hard cash youre investing it.

The general recommendation for savings is to first create a sufficiently large emergency fund. This is meant to cover things like sudden medical bills, repairs, and other things of that nature that can't wait. This needs to be quickly accessible, so it rules out GICs. I'm guessing a plain savings account would count as cash that can expire, so that's out. That leaves us with bonds and equity. Both have a fair amount of volatility. This isn't a problem if you have enough money because everything trends upwards in the long term. If all you have is $500 saved up and you need to draw from it during a market downturn, you've probably just lost $50 of your hard earned money. That's a huge amount when you have so little. If you have $5k and you lose $50? Whatever, chump change.

Secondly, rich people definitely do not hold on to plain cash. The vast majority of their wealth is going to be in some form of investments, so if this is meant to prevent wealth concentration, I don't see how it'll manage to take anything away from them.