Most states do impose a corporate income tax, but not all. How the OCPP summarizes its argument:“Corporations have designed the tax system to their advantage. Shining a light on the corporate tax system would allow Oregonians to see which corporations pay the bare minimum in income taxes, while reporting big profits to shareholders. In short, corporate tax transparency is essential to make the corporate income tax system work for the benefit of all Oregonians.”This is not, or at least not necessarily, a call for changing or increasing corporation income tax rates. Second, state corporate tax breaks have been blasted as giveaways and supported as investments in the economy.