It's not self-evident that what people say to questions asked by pollsters translates very neatly into how they would vote on proposals that haven't even been written yet, especially when the people in question self-evidently have no clear of idea of what taxes do what. 

I still think a scaled down Measure 97 would fly and be efficient. I also like the thinking behind the reduction in the mortgage deduction, and I tend to favor the idea myself, but that deduction is a significant and longstanding benefit, built into people's budgets and the choices they have made. Cutting back there would be strongly opposed by the people affected.