Well, the retirement savings are somehow (directly or indirectly) invested into a stock market, so they are safe from inflation, or even complete currency crash

Well, the retirement savings are somehow (directly or indirectly) invested into a stock market, so they are safe from inflation, or even complete currency crash. When inflation is high, you even benefit, because people's consuming activity increases as there is little they could do to save money which is being burnt with inflation, so they spend, improving the bottom line of the companies they buy stuff from - and stocks of which you have. Or they buy stock directly, increasing real price of stock directly by increasing demand. That is valid even in the case of extreme inflation - like 1923 Germany. People suffered, but stocks didn't. Only exception from that rule was the 70s oil shock, but that wasn't a real crisis (economy itself was doing just fine, only the oil became expensive for purely external political reasons).