I continue to wade into the weeds of how Ireland might accommodate an extra one million people. At some point, I will have to turn back, but today is not that day.  Last week I wrote about the Metropolitano Milanese (MM), a high-performing state-owned enterprise from Italy. The MM does civil engineering on behalf of the Milanese government. It started out building subways but has expanded into other works like sewers and public housing.  The MM is high-performing because it can build subways cheaply and well. Milan’s subway lines cost roughly 10-20 per cent of those in the US and other English-speaking countries. The MM sells its…