Governments HAVE been encouraging private pension provision since the 1980s when they introduced private pensions, SERPS (then S2P), then workplace pensions became compulsory for larger employers in 2012 and all employers in 2018.
Trouble is that, like the increase in women's state pension age, too many people can't be bothered to do any research and/or don't show any interest.
I remember a couple of studies/reports back in the 90s about the forthcoming pensions timebomb that were all over the media for weeks/months.
Even today, with compulsory workplace pensions, only around 80% are actively participating in workplace pension schemes. So 20% aren't. No doubt they'll be the "WASPI's" in 2 or 3 decades time who claim they didn't know anything about it!
Personally, I think it should be compulsory for all, employed AND self employed, with no opting out at all.
As proved with SERPS and S2P, far too many people just won't engage with long term planning. I remember being involved in presentations to various workplace staff in the 80s trying to educate them and encourage them to join their employer pension schemes. To me, it was a no brainer, typically, pay in a couple of percent of salary, get a couple of percent knocked off the NIC deductions and the employer chucks in a few percent too. But the take up was stupidly small, even though it "cost" them virtually nothing. No sense in it at all, with most of the staff looking bored and disinterested and waiting for the coffee and biscuits rather than engaging!
You can lead a horse to water but you can't make it drink.