Every year, the IRS and equivalent state organizations publish pages upon pages of [tax tables](https://www.irs.gov/pub/irs-pdf/i1040tt.pdf). This year the federal one comprises 13 pages, but of course that only handles taxable incomes of up to $100,000. Beyond that, page 14 has a tax calculator. I've always wondered: why bother with these tax tables? Certainly addition, subtraction, and multiplication isn't too difficult relative to the other complexities of the tax code that taxpayers are expected to understand. Why not just have everyone use the tax calculator?