Not wanting to give Old Fart a heart attack, but I'm about to say something very positive. As you know, we were placed in the Portable Pension Plan in 2008. For many older couriers it won't replace what they lost not getting a full traditional plan.
BUT, if you're starting out in your twenties, the new pay plan will have you topped out in your thirties. That gives you a lot of years at better pay to fund your 401k. That plus your portable pension plan will give you even more than the traditional pension did, assuming you contribute enough weekly for a long time
How much should they contribute, in your opinion?