why is it ok for a group of people calling themselves the government to force everyone to buy their services?
The reason is simple: you don't understand the law, and
particularly the authority of law. For whatever reason, you have not educated yourself on this topic.
It has been repeatedly declared by the courts of this land (America) that an enacting clause is to appear on the face of every law which the people are expected to follow and obey.Here, I will help you out; if you are in a rush then simply read
the last page or the chapter entitled "Our Nonconstitutional Legal System", but do read the entire document if you can:
http://econcurrent.com/devine/files/08-Law/Authority%20of%20Law%20part%202.pdfGet people to voluntarily agree to follow a set of laws or rules and get rid of all this murky circular logic. Of course that would take the power away from government and give it to the people so this is why the ruling elites will never propose such a system.