Great response. The church has certainly failed at governance on numerous occasions, especially pre-Reformation. My hope in my post above was that whatever government structure we choose to embrace in the future embodies some of aspects of post-Reformation church polity.
Some estimates now suggest there are as many as 45,000 Christian denominations at present. Freedom of association is the freedom I would love future governments to embody. This would result in a splintering of governments down to the most management level, while providing for larger governments (like the Catholic Church is for larger churches) for those that want them.