Steps says, "Many people fascinated by parecon ask would there be a government to control all this? Pareconomists reply that government exists to correct market deficiencies or supply goods (like national defense or healthcare) that markets are bad at supplying."
Actually, some pareconists might say that - I would, more or less, say that, with caveats and much more to say - at least about government in a capitalist economy. But no pareconist would say it about polity in a society that has a parecon. Because (a) such a society would have no market deficiencies because it would have no markets, and (b) the economy would take care of public and collective goods.
What we or I would say, instead, about a polity that would operate well in a society with a parecon is that in any society there are necessary and needed political functions having to do with arriving at shared norms (legislation), dealing with disputes and antisocial actions (adjudication) and developing and carrying out shared projects (implementation) and that in a good society a polity - or government if you like - would hopefully accomplish these functions in ways that also propel values we hold dear such as solidarity, equity, diversity, self-management, and perhaps we would add to this list, in this case, justice. I recommend readers take a look at Stephen Shalom's work on this topic, which can be found in the Life After Capitalism section of ZNet (
www.zmag.org).