> You can pretty reliably do something like, over a controversial tax hike that affected 2% of the population, get 30% of respondents to claim it made their taxes go up, if there was a heavy media push about how it'd make everyone's taxes go up, and that's for something they should have direct experience with

I don't think this is necessarily because those voters are stupid. It could be that they oppose the tax, and they will give whatever answer best signals "I oppose this tax", regardless of whether their answer is literally true. This is a reasonable strategy and it makes sense why they'd do it.