I don't think that this has any chance of actually being implemented. (a) This is pre-empted at the city/county/local level by RCW 36.65.030 [0] This is not t

I don't think that this has any chance of actually being implemented. (a) This is pre-empted at the city/county/local level by RCW 36.65.030 [0] This is not the State constitution but rather state-level Statute. The state legislature could very simply amend this to allow Seattle to levy its tax. (b) According to Article VII, Section 1 of the Washington state constitution, all taxes shall be uniform upon the same class of property. If (a) was repealed by the state legislature, Seattle would still be unable to levy a tax on the rich. (c) Seattle would be stuck with a flat income tax (of 0% or another flat rate) because of the Washington State Supreme Court. It initially ruled in 1933 that income is a class of property in Culliton v Chase. [1] It has upheld that classification multiple times since then (e.g. Power, Inc v. Huntley [2]). (d) A statewide initiative to initiate a similar tax on income above a high threshold ($200k/$400k instead of $250k/$500k) was defeated 65%-35%. That is only the latest in a long line of failed ballot initiatives to introduce an income tax in the State. [3] Voters do not want this. [0] https://app.leg.wa.gov/rcw/default.aspx?cite=36.65.030 https://app.leg.wa.gov/rcw/default.aspx?cite=36.65.030 [1] PDF: http://dor.wa.gov/content/aboutus/statisticsandreports/wataxstudy/Appendix_B.pdf http://dor.wa.gov/content/aboutus/statisticsandreports/watax... [2] http://law.justia.com/cases/washington/supreme-court/1951/31825-1.html http://law.justia.com/cases/washington/supreme-court/1951/31... [3] https://ballotpedia.org/Washington_Income_Tax,_Initiative_1098_(2010) https://ballotpedia.org/Washington_Income_Tax,_Initiative_10...