I'm not sure how much I trust these tax rates. My understanding was that government spending is roughly 33% of GDP here in the US. This was true when I was in undergrad, and it looks to be roughly correct today. https://www.usgovernmentspending.com/percent_gdp (not sure how much I trust this site, but it corroborates what I learned in undergrad with only a few minutes of googling). This means that the tax rate must be close to 33%. Else you'd have amazing deficits balooning quite quickly.

Maybe it's ignoring corporate taxes? or ignoring other things on our W-2, like L&I and social security/medicare? It 's also probably ignoring local taxes, a 10% sales tax is hard to ignore.

I once calculated my effective marginal tax rate at 45%, and it stopped me from pursuing a higher paying job, since my take home didn't change enough to be worth the higher stress and the money I'd have to spend to combat said stress.