Doesn't monopolization prevent the ability to make alternatives to use instead, such as the roads? Health care?
Doesn't this decrease efficiency?
Yes, and no. Healthcare is an example how? How is this related to the idea of taxation as theft though? Many different nations have different competing systems over time.
I am familiar with how it helps the system and reduces costs. It made things more efficient. That said Obamacare is a right wing healthcare system. Single payer would have been better.