Love it - great application of publicly-available data. Also ref https://news.ycombinator.com/item?id=47420307 US govt provided public debt resources.

By the way, the 1040 instructions have a pie chart like this (ref https://www.irs.gov/pub/irs-pdf/i1040gi.pdf, page 122). Not that most people do taxes themselves, or have a reason to read to page 122 of instructions for a single form. But still it's there and perhaps a nice gesture by the IRS.

Breaking it out into pie charts etc like this can be really helpful. In my view the real kicker with taxes is the opaqueness. Kinda like a meal card versus paying for every meal, or like using a credit card versus paying with cash, it's hard for humans to really grasp what's going on unless they're involved.

Of course it would be impractical to pay taxes separately to every waiting hand in government bureaucracy. But on the other hand maybe the number one goal shouldn't be ease of use, either. Maybe a little friction when paying for public services could be a good thing for citizens who are interested in a healthy country - my opinion.