The salary gap has narrowed between a Superintendent and a teacher at the highest level of the pay scale, he pointed out.

One claims that as a result of the salary gap, "many experienced teachers in New York City are being cherry-picked" by suburban school districts.

In New York City the shortage is compounded by a salary gap not just with other professions, but with teachers in the entire metropolitan area.

This explains much of the salary gap.

The rule is that the longer the experience, the wider the salary gap.

Yet patient load alone cannot account for the salary gap.

And outside New York, the salary gap between judges and even the top-earning lawyers was relatively small.

The salary gap is less of an issue for retirees, and the opportunity to give back to the tax system can be quite appealing.

But for decades, that salary gap has been shrinking - until now.

As a result of the reduction in women's earnings and pensions over the course of their lives, these salary gaps cause poverty among elderly women.