Not enough of us. Implementing an income tax (which we've actually done before!) would require an amendment to the state constitution (which we didn't do the first time, oops). We've made one attempt to fix this in the past 40 years, which failed almost 2:1. For any politician outside of the Seattle city limits, proposing a state income tax is political suicide (and it's not a slam-dunk policy for everyone within the city either).

With the way things are now, I seriously doubt we'll ever implement a progressive income tax in this state in my lifetime. My wife and I make enough money that we benefit from our horrible and regressive tax system, and I really wish it wasn't this way. Things will continue to decay.