Don't ask a barber if you need a haircut

Don’t ask a barber if you need a hair cut. Don’t ask a mechanic if your car needs a service. Don’t ask painter if you house needs a new coat.

You know the answer before you ask. For the same reason, don’t ask unions about public policy.

If you wanted advice on education policy, the teachers union is not the first place you would go.

If you wanted advice…