Wages are stepping up over a few years and so far hourly wages are up 11% for low wage earners in Seattle. An 11% increase in one cost component that is 20% of total cost translates to a 2% increase in total cost. This is less impact than the devaluation of the dollar at the start of Obama's presidency to help banks.
Not as many small businesses have opened in Seattle as they would have predicted, but the small businesses that are there are doing ok and they haven't cut employee hours or closed shop.