It's possible for some of that to continue, but we really don't know what would happen if we directly connect payrolls and finances of the healthcare industry to the federal government in the US. It's a fair question how such a big connection would suffer when the government is punitively closed in a faustian bargain as part of a political struggle, as seems to be common recently.

There might be a few top-down emergency provisions to ensure checks go out to keep the system from toppling, but I wouldn't work if my pay is frozen and neither would my plumber, electrician, lawyer, etc. The last few shutdowns have run over a month - that can easily exceed the cash reserves of most businesses (that would be providers) and large businesses would shutter or have layoffs before burning that much cash.

We can't be so confident in how a $5T/year system would react if its primary cash flow valve is turned off, is all. Handwaving away the scope and complexity doesn't help anything.