Are you sure about this?
To address your direct question, it's my position that using force or the threat of force to compel someone to pay you money -that you say they owe you- is no more moral when the government does it than when the Gambinos did it. Obviously, it's legal when the government does it but the government is not a moral entity.
Try thinking more about your own arguments and how they might practically be applied.
Debt currently works that way in the vast majority of cases.
If you don't pay Comcast or Verizon (or whomever) for your internet service, they'll stop providing service to you. They'll also report you to Equifax, Trans Union and Experian so that other people will know that you can't be trusted to pay your debts and they'll require a security deposit before they'll provide you with service.
If you overdraw your bank account and close it without settling the debt, they'll report you so that other banks know about the issue and those other banks will refuse to allow you to open a new account until the original matter is resolved.
If you don't pay your Visa bill, again, they will stop extending credit to you and you'll be reported to Equifax, Trans Union and Experian. Other credit card companies will know about your history and they will refuse to extend any credit to you.
In none of those cases is force or the threat of force used to collect a debt.
EDIT: Oh, and you're misusing the term "strawman". I was asking questions about your post, not positing an argument for you.
I never advocated such a position.
It was a strawman.
http://en.wikipedia.org/wiki/Dispute_resolution_organization
Of course, taxation is legal. Using the tax code to minimize one's tax liability is legal and also amoral.