Single payer, or public funded health insurance (whatever you want to call it), lowers prices all around through better negotiation.
Single payer is essentially the antithesis of monopoly. Whereas a monopoly is a single seller with many buyers, all of who have zero negotiating power, single-payer is a single buyer with a plethora of sellers whose only negotiating power is trying to undercut the prices of their competitors. The in-network/out-of-network shit that we deal with in the US is an attempt to skew toward monopoly by limiting sellers.
Let's look closer at Germany.
Germany pays 12% of it's GDP into healthcare, we pay 18%:
Health expenditure, total (% of GDP) | Data | Table
Germany's GDP per capita is also lower than that of the US ($47k vs $54k):
GDP per capita (current US$) | Data | Tablemeaning that the absolute value of 12% GDP over there correlates to 10.4% of GDP in the US, which is pretty much exactly what Canada pays as their GDP percentage for their universal health care. So, were back to the same savings of >$1T dollars if we had Germany's single-payer system.
Anyone else want to try again?