An HSA is only good if coupled with catastrophic coverage. Also, typically health care spending is skewed towards the last years in life. While a 20-something can build up quite a nice balance before odds are they’d need to dip deeply, what is this going to the 70-something? Without more details, this sounds like a “Duty to Die” policy.
I don’t know the details either, but I assume he is not proposing cutting off the program for those too old to save adequately. Personally, I think catastrophic insurance is the way to go, and if insurAnce didn’t cover routines visits and procedures the providers wouldn’t charge so much for cash payments, and people people would budget their healthcare.