Maybe not average aged working people, but everybody I know in the 60+ age group (mostly family) usually has regular interactions with the medical system, or at a rate far higher than 25-45 year olds.

And there's a lot of older people. As a cohort, there's only slightly fewer boomers than millennials.

Old people aren't necessarily the ones in a position to change the system. And the old people with power don't use the public system.