The political math was simple and should have been fool-proof: Proponents of a high-earner income tax in the state of Washington needed only a majority of voters to approve a tax on a tiny minority of their peers. After all, Initiative 1098, which would have imposed a 5 percent tax on the adjusted gross income of individuals who earn more than $200,000 — or $400,000 for couples — and a 9 percent tax on the AGI of individuals who earn more than $500,000 — or $1 million for couples — …
