tax base

So college grads can better support themselves without government assistance and in turn contribute to the tax base.

Her property taxes are so high because the businesses have all fled, which means that the tax base is very thin.

Then follow up those measures with serious steps to contain long-term Medicare spending and expand the national tax base.

An older population will cost far more in health care spending and pensions, and will be accompanied by a declining tax base.

They want a big government with a generous welfare state, and a tax base that's about half the necessary size.

And it could make the tax base broader, so personal tax rates could come down, not go up.