The people who work to pay into the system so others don’t have to?
Everyone eligible = greater demand. Same supply.
A cheap answer but the most blunt.
Human labour is not interchangeable. I don’t want a plumber removing my kidney.
I surmise this would make the welfare cliff worse.
It would become all or nothing, for eligibility of other benefits. Sort that first.
Sweeping solutions fail.
For example, this is an ageless roll-out of the pension. That system is going so well.