To me it's not just about the government being able to block transactions. The privatization of the payment system (which is basically complete in my country)

To me it's not just about the government being able to block transactions. The privatization of the payment system (which is basically complete in my country) means that my ability to participate in the economy is dependent on the whims of my bank, credit card issuer, and their (automated) blacklists. Think of all the stories of Paypal accounts being frozen for no reason, or bad reasons, or even good reasons. Remember that at least once, for Wikileaks in 2010, Paypal unilaterally decided that what an account holder was doing was illegal and shut them down - and of course, legally, that's their right. Private companies get to choose who they do business with. Personally, I think that's a rather worrying prospect: A private entity can now 401 my request for groceries. The payment system is critical infrastructure and should be treated as such.