Imagine if I were to tell you there is a large group of government employees, with generous salaries and ridiculously cushy retirement pensions covered by the taxpayer, who enjoy incredible job security and are rarely held accountable even for activities that would almost certainly earn the rest of us prison time. When there is proven misconduct, these government employees are merely reassigned and are rarely dismissed. The bill for any legal settlements concerning their errors? It, too, is covered by the taxpayers. Their unions are among the strongest in the country. No, I’m not talking about public-school teachers. I’m talking...