It seems Portland’s city leaders just can’t resist another taxpayer-funded trip abroad. This week, several Portland city councilors and housing staffers are jetting off to Vienna, Austria, supposedly to study the city’s famed “social housing” system. Vienna is often hailed as a global model for government-run affordable housing, with roughly 60% of residents living in units owned and managed by the city or nonprofit cooperatives. But critics are asking the obvious question: why on earth do...