The Moving Picture Institute, in conjunction with Reason.tv, has a great new video out explaining “The Machine” that keeps teachers unions alive. It’s definitely one you should share on social media.

With the Chicago Teachers Union going on strike this morning—or better stated by Mayor Rahm Emmanuel, “a strike of choice”—it’s important to recognize how these organizations can continue to operate despite the continued deterioration of the American educational system.

The video speaks for itself, but, briefly: Teachers are paid by school districts, which are funded by taxpayer dollars. Those same school districts must, by law, take union dues out of the paychecks of teachers and give them to unions. In turn, unions use those dues-dollars to support politicians that keep pro-union policies. And so “The Machine” churns on.