Iamon lyme:
That concept is thrown around a lot and usually has nothing to do with the actual topic.
As far as doctors go, there are plenty of doctors working under capitalist economic rules that are guilty of botching the job whether it be diagnostic or surgical.

Socialism implies that the means of producing and distributing goods is owned collectively or by a centralized government. Neither socialized medicine nor government sponsored public works projects are socialism. Government sponsored health insurance is not the same as socialized medicine. There will still be numerous functions provided by the health industry that will be elective and not covered by insurance.

Without government sponsored public works projects, we would not have our interstate highway system. That system is in disrepair. Fixing it will put many of us to work and provide a valuable resource in better working order for all of us to utilize including corporations that need to move products where they will be available for us to purchase and thereby further stimulate the economy.