This is not too different to the highly successful systems used in Singapore (and Switzerland, if you squint a little).
I'm skeptical for a few reasons:
- Hospitals and insurers would both equally hate it
- Republicans have actively undermined any semi-serious proposal, and have even raided the HSA tax advantages a few times to fund more regressive tax cuts elsewhere
- This is a loosely thrown out idea from one of the least trustworthy administrations in American history, who has failed to achieve anything meaningfully through legislation.