Clickbait-y title, or at the very least a sensationalist and simplistic interpretation of the data. That 1 in 3 is mostly young people; they have neither the ability to save (due to low wages, student debt, being priced out of the market) nor the incentive (retirement is too far away, perhaps also concerns the stock market is not a safe place). Probably not much trust in the system overall either, given how the older folks seem to keep pulling the levers to maintain things for their own benefit.