There is no progress, its just backward stupid. It is not clear that it would effect no one; don't overlook unintended consequences.
Clearly, this has nothing to do with 'Tony the Tiger' in Battle Creek; Portland can only impose a tax within its jurisdiction; that means on CEO's who run a business domiciled in Portland, or otherwise under Portland's jurisdiction to levy personal income tax.
So, we are not talking big business, we are talking regular urban business, things like, care dealers, clubs, bars, fast food, retail, professions, advertising, banking, landlords, etc. We are also looking at a formula that does not scale well.
Consider a club or fast food owner for instance. If the "average worker," however that is defined, earns $15 (no benefits considered) and works 28 hours per week to come below the Obama care tax, that comes to about $22,000 per year with no benefits.
Then, if the CEO, who could be the owner, earns an annual amount of $2,200,000 (salary + profit, assuming LLC enterprise form) then he will be subject to a 10% surcharge on his Portland city income tax (Of course this is simplified in gross terms, you have to consider the actual adjusted gross income under the Portland City tax code with all of its deductions and add ins).
So, someone who owns one club or one fast food restaurant is not likely to qualify...but what about two or three? Clearly this is an incentive to not get big in Portland, invest outside the city if you want to scale.