Firstly, at my age, it's too late to start saving the modest attempt I could scrimp. It wouldn't amount to enough to be useful. My mother also had this issue. She was advised to contribute the small amount she could manage, at considerable hardship to herself, at 50. All that happened was that the tiny amount she'd saved meant she was JUST (within £10) over the limit for pension credit (no idea what the equivalent benefit is now).
Secondly, unless we're talking about contributions between £20 or £30 a month, anyone on minimum wage literally doesn't have the money to put into a pension. So yes, a 20 year old (non graduate, basic job) may well be able to save that much. But given the way rents have hugely increased, the rocketing cost of basic utilities, and increasing food prices, an individual on £22K a year really really can't afford pension payments. They're trying to keep a roof over their heads.
THIS is the reality of most people right now. I mean, I hope the recession eases up a bit and then maybe for a while we'll have a little more money in our pocket. But to have a place to live, to heat it and to eat, is breaking people right now. So to then demand they pay into something that doesn't currently enable life is just not feasible.
It's not a lack of willingness. It's a lack of ability. Until government address this, nothing will change. I would have thought Labour would understand this. I totally get that the Conservatives, party of landed gentry, don't.