There are two possibilities:..
That sure is a lot of words and graphs which essentially fail to prove your case: namely that the collective benefits of UHC, economically and otherwise, are outweighed by the disruption to healthcare as it exists (which itself hasn't been meaningfully quantified or assessed).
No one is denying labour as a majoritarian expense in healthcare as it exists.
What is being disputed is your assertion that the status quo and the economic well-being of those in the health, pharma and insurer industries, which yields a cost of care that's among the highest on the planet while failing to cover a significant percentage of the population, outweights the collective social and even long term economic good of UHC SP. With this I completely disagree. Though I obviously cannot prove beyond all doubt that this will be the case as I cannot peer into the future, the existing precedence of other countries suggests I'm probably right.
As for your two other assertions:
#1: This is not my argument, nor my suggestion. I certainly don't shy away from necessary disruption and the creative destruction of inadequate paradigms in California healthcare. Further, administrative expenses are _not_ some minor component of overall health costs as was demonstrated earlier. By the way, the California state estimate assumes little to no savings so there likely won't be many surprises even if SP tackled only fringe expenses.
#2: Yes, SP certainly will take a serious whack at costs if it is properly implemented. There will be casualties. Health sector wages are likely to go down; hospital staff will become leaner; healthcare insurers will be routed or repurposed into secondary modes of coverage. These are all acceptable costs when one considers the delivery of cost effective healthcare to everyone in state, and all the secondary offshoot benefits of that to the economy and standard of living. That tradeoff is very much worth it. When you have several industries that, as stated, have gotten fat off exploitation off both the lack of elasticity for healthcare demand, and the lack of any effective price moderating force, the destruction of those accumulated inefficiencies, including excess labour and salary and entire administrative layers, is going to have some side effects.
Personally, I wouldn't mind in a phased in decrement of prices over time if only to minimize the short term shock and believe that's probably advisable, but that isn't mandatory.
...I object to the notion that it's realistic or feasible to assume that massive real reductions in revenue to care providers is going to happen. As long as our government is answerable to voters, that's not plausible...
Except other countries have and did. Why should America be any different?
Given the substantial majority support for SP in California despite the price tag (which is really $200-106 billion, depending on who's doing the cost assessment after medicare/medicaid and other such payouts), the voters have been actually quite clear on the fact that they overwhelmingly support singlepayer; it is precisely because government is supposed to be answerable to voters that it's plausible. Big pharma, providers and insurers certainly aren't majoritarian voters so this argument is extremely weak. What they are however is powerful donors; obviously Rendon has other ideas about his accountability to constituents, preferring instead to placate their interests instead.
Frankly, I don't understand the obsession with single-payer.
Maybe because it's been repeatedly demonstrated to yield comparable to superior outcomes while being vastly more efficient and cost effective with more comprehensive coverage?
How the U.S. Health Care System Compares Internationally - The Commonwealth Fund
Bottom line:
A: SP is affordable no matter whose estimates you're going with, though yes, substantial tax increases will be required. That's fine though according to the people of CA; they're evidently willing to pay, even after being confronted with a 15% payroll tax.
B: Guaranteeing comprehensive coverage for all of CA, including millions of uninsured, is more important than guaranteeing the benefits and salaries of a small minority of people working in health, pharma and insurance that have been collectively profiting off a bloated system.
C: Per the precedence of other countries, adverse effects of health care healthcare disruption long term is unlikely; further long term health outcomes are likely to be better.
D: SP is extremely popular; implementation is politically viable. If there _is_ a substantive political pushback, it is from donors and industry interests, _not_ the electorate.