I always assumed that was due to the COL adjustments. I might be wrong. These following #'s are based from
http://www.bestplaces.net/COL/
For example, A salary of $75,000 in Portland, Oregon should increase to $86,931 in Chicago, Illinois, (to meet the same standard of living).
So that extra 9,000 (or so) might look better on paper, but doesn't mean they're really making more spendable money.
Another example, A salary of $75,000 in Portland, Oregon should increase to $128,716 in San Francisco, California (to meet the same standard of living).
A salary of $75,000 in Portland, Oregon should increase to $107,015 in Los Angeles, California (to meet the same standard of living).
A salary of $75,000 in Portland, Oregon should increase to $113,092 in New York, New York (to meet the same standard of living).
So part of the reason why some professions are paid at a "higher" rate is because those who work there HAVE to make more to live in those cities, or they wouldn't be able to live in the cities (or areas) that they work in.
Not all businesses have tons of money, but the amount of money that goes up, compared to the amount of those who are bitching, is not equal.
Meaning, in some cases the tax "increase" they're seeing, does not equal the amount of complaining they're doing. Some, but not all, people are looking for any reason to come off as not the jack-hole who fires people because of economic down times. if you can pass of the blame onto a tax system that most people don't look into (the owners themselves) you do it.
I just haven't seen any non hyperbole comments made by someone, that shows that businesses in Oregon are going to be severely taxed to the point of that being the REAL reason they've closed. It might push them over the "edge", but I don't think it's nearly the cause people think it is. As I said earlier, I might be wrong about this (and might've missed a link in this or another thread).