The
net savings would be $450B, but the total cost would still be in the 10s of trillions of dollars (Edit: 30-50 over 10 years), bigger than all of our federal spending combined. It's one thing to have as an objective, and another as a plan for getting there. The proposal they cite would make federal healthcare expenditures 69%(!!!) of the GDP (Edit: total federal expenditures). It's simply not realistic to convert our entire economy into a government and healthcare first system within only 4 years.
These calculations also ignore any affects of changed consumer preferences if you eliminate copays and deductibles, something no other universal healthcare system has done.
This is one of those calculations that is entirely accurate, but also entirely misleading.