Also as ever we are blaming individuals without looking at the wider context- traditionally excellent pension providers - universities local authorities teaching etc have commonly downgraded benefits to new entrants, In many cases offering a basic DC scheme. This means that cohort of low earners who retired with excellent pensions fall away.
very, very few people get a good pension with a basic employer contribution, no matter how much the reasonably contribute.
secondly it’s the wider economy that’s dictating the low wages which mean people can’t afford to contribute tho the pension the do have