I'm not serious, these are just the first cynical thoughts that came to mind, but I feel like this question should be one we can actually answer? We've had both pensions and time to see varying degrees of successes and failures regarding them.
I don't get it. Maybe every single S&P500 CEO has a deferred compensation plan, but when a union asks for it, it's always corruption?
And you see why they died out. Y-X consistently became negative as people lived longer, especially when we moved to a service industry. So they ended it and front-loaded the money. There's probably a lieu of tax codes and other benefit they get from matching 401ks as well that I do not know of without researching.