Pensions are gauranted,
Guess you never heard of the PBGC?
Just because all groups at US had our Defined Benefit Plans terminated our benefits (some reduced) will still be paid by the PBGC, you dont lose your pension.
The IAMNPF is a multi-employer plan, meaning if your company goes out of business your pension will still be paid at maximum benefit levels and not reduced.
Is your 401K gauranteed?
Go ask all the people that lost thousands on US stock, Enron, and when the market drops your 401k drops, plus a pension plan is not money out of your pocket while a 401k is money that is earned by you.
The 401k money is not in your pocket, is has stringent requirements to get to it in case of need and you are taxed on it when you start drawing down on it. You get less money per week in your check as the 401k money is deferred income.