The US did essentially copy and paste the Swiss system. That's what the ACA was modeled after.
It left out a few key bits though - like requiring those who sign up for healthcare backpay premiums for the entire period they were uninsured to whoever they sign up with.
Also AFAIK drug prices are fixed nationally and negotiated by the government?
Then the basic plan is around 300-400 CHF (regulated by the government) and the deductibles are capped at CHF 2,500. This seems to be covering the overwhelming majority of costs (if we exclude government + cash) since the volume the market for premium/supplementary coverage seems to be pretty small (<20%):
It left out a few key bits though - like requiring those who sign up for healthcare backpay premiums for the entire period they were uninsured to whoever they sign up with.