Are Government Unions A Threat to Freedom?

Sam Cook argues that government unions are becoming a problem:

“Labor unions are drastically changing the way governments are administered and the entire public employment relationship, from recruitment to retirement. Experience has demonstrated that once a collective bargaining statute is enacted, there is no turning back from union collectivism—with its inevitable adverse impact on government’s objectives, its budget, its productivity, its essential public services, its taxpayers and its business climate.”

No altruism here.