I've worked as a consultant for too many government departments in Canada and the U.S. to believe they're capable of pulling off a conspiracy (of any kind) — they can barely agree on what kind of sandwiches to order for a lunch meeting.
For a lot of Americans, the failures of the ACA (where it didn't work) left a bad feeling about universal healthcare, so in that case, the hypothetical conspiracy would be to kill off the desire for any kind of universal healthcare by introducing a highly-flawed one.
This really isn't about "a lot of Americans" - the division between "we want it" and "we don't" isn't that great. It's about politics and money.
Let's work it through more critical, shall we?
Who benefits?
The big health-care systems that can reduce overhead and squeeze pay to people as they get bigger?
The government contractors and insurance companies that will handle/manage the payment systems for a fee (like is done with CMS now)?
The insurance companies that can offload the less profitable patients and sell supplemental insurance?
The politicians that can claim that they "now covered everyone" or "brought the big evil corporations to heel"?
Pharma that depends on FDA/NIH to approve treatments?
Those with the ability to lobby and politicize things?
How about the losers?
The patients, who will be shunted to NPs and get far less doctor time?
The patients who will be handed script after script instead of getting a full and good diagnosis?
Pharma that has seen the likes of Martin Skreli and jacked up med prices?
The local doctor that's already squeezed by reimbursements (Medicare being particularly low)?
What about the docs that won't take medicare now as the reimbursement is too low?
Patients, who will see longer wait times?
Docs and local pharmacies that will be squeezed on price and availability of drugs as production is further crimped?
Folks who might benefit from new technologies?
Rule 1: government doesn't have the capability to handle payments itself. That will be outsourced.
Rule 2: this will not be "universal health care" as in "everyone can see anyone" - it will be government single payer, where a Fed entity will provide payment, but not service.
Rule 3: the deck chairs will be rearranged, but corporations and politicians will still benefit. The little guy won't.
I've worked for/with/in plenty of government agencies myself. There are plenty of ways to "beat the rules", and the rules rarely benefit the little guy. (and to be clear, 'deregulation' of stuff also causes similar disruptions, for example the deregulation of airlines)
This is why I say the entire system needs to be burned to the ground and built up anew. I am realistic enough to know that it's not going to happen.
I'll point to the Covid vaccine right now. A lot of folks are not getting vaccinated (partly a trust issue), and there are doses going to waste. Yet the FDA and NIH are not generally authorizing a third booster shot that manufacturers say are needed (Pfizer being the leading group) and other countries are already being dispensed (noted that they have approved it - only Friday - for a limited group of people). There's evidence that the original shots lose potency over time, and Delta (among others) is much more virulent. The FDA is chartered to provide treatments that are "safe and effective" - the vaccines have proved safe. So in a pandemic, why not lean more to the "safe" side even if the "effective" side is shown to be the case although not as deeply as the "safe side". It's not for money - the Feds have already bought the vaccines (and are sending it to other countries). There must be some other reason for the reluctance. But it's government and politics so we may never know.