Yet another issue with the modern US iteration of capitalism. The intentional design of the US stock market for people to depend on it for retirement, instead of getting enough wages to save their money risk-free or with government benefits.
Pushing 401k and IRA, making it so that's the only viable way (other than having a high-6-digit wage) to live comfortably in retirement, is a detriment to a healthy society.
What version of capitalism wouldn't have the problem of risky investments paying out more than safe ones?
The people with better ROI are just going to outbid the ones with a worse ROI for their retirement spending so if you just invest it into T-Bills you'll do worse than inflation.
I'd say a better version is one where the average citizen does not have to *rely* on a boom-bust, unregulated financial system to secure their ability to survive in retirement. Through tax, fiscal and monetary policy it would be better if people could rely on government services and normal wages to get through their elder years.
We have Social Security though and that doesn't seem to be working much better.