Teachers unions make firing bad teachers grossly and unreasonably difficult. They also employ insufferable people at embarrassingly posh salaries.
Take Michael Mulgrew, the president of New York's United Federation of Teachers, for example.
The well-heeled union boss pulled in a base salary of $250,000 — and more than $280,000 in total compensation — in 2013 alone, the New York Post reports.
Mulgrew's sweet 2013 salary was about four times higher than the average salary of New York City public school teacher — $73,751 according to CBS.
Mulgrew is, of course, famous for his hateful and truly unhinged rant against critics of the Common Core Standards Initiative in July 2014. (VIDEO: This Teachers Union President Will 'PUNCH YOU IN THE FACE' If You Don't Like Common Core)
"If someone takes something from me, I'm going to grab it right back out of their cold, twisted, sick hands and say it is mine!" Mulgrew bellowed clownishly. "You do not take what is mine!"
The union boss also challenged opponents of Common Core and union control over education to a fist fight.
"I'm going to punch you in the face and push you in the dirt because this is the teachers'!" he maniacally exclaimed, with veins popping in his shiny, balding head.
Attendees at the convention said the menacing union boss's intimidating diatribe was frightening and that he should be prevented from being in the vicinity of actual, live children.
In addition to Mulgrew's impressive salary, about 30 other union staffers receive annual salaries over $150,000.
More than 100 union employees make cozy salaries of over $100,000 each year.
The New York City teachers union frittered away $4.7 million on political activities and lobbying in 2014. In 2013, the figure was about $3.7 million. (RELATED: Teachers Unions Make Demands After Wasting $100 Million In Midterms)
Much of the lavish political spending in New York City went to support the agenda of Mayor Bill de Blasio.
The United Federation of Teachers gave $236,440 in 2014 to New York Communities for Change, a group which opposes charter schools and which the Post describes as nothing more than a rebranded ACORN.
The union forked over $25,000 to Rev. Al Sharpton's National Action Network as well.