I’ll give you an example. HR 25 is to the US Income Tax Code what Year 2016 100 Gigabyte Ultra Burst Wimax is to 1988 100 baud dialup.
https://www.congress.gov/114/bills/hr25/BILLS-114hr25ih.pdf
I prefer a flat tax for all incomes. Everyone should have to pay. The sales tax would work except then they talk about having to give poor people refunds, etc., then there you go again with a big agency full of union gov’t workers.