Duality of a Job that helps the economy

What is the duality of a Job that helps the economy? One that hurts the economy?

Property Tax Rebellion Brewing After Real Estate Collapse

"The National Taxpayers Union, a Washington-based advocacy group, estimates that 30-60 percent of homeowners are over-assessed each year"



So it appears we need more property assessors, why aren't they hiring? Oh I guess that would mean less tax revenues. And if that happened they would have to lay off property assessors.