Ignoring the political issue: People, even otherwise very smart people, don't understand how tax brackets work.https://twitter.com/DrTerriC/status/932067384453627906 …
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It is impossible in the US tax system to earn an extra dollar and have your post-tax implication of that extra dollar be negative... if you're middle class or above. (It is, regrettably, very possible to have this happen if you're receiving public benefits.)
One of things I don't understand about tax brackets is why not just a smooth function instead of using brackets that approximate it ? It can't be because it's easier to understand, since people don't understand tax brackets anyway.
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