Most of the world uses some form of VAT tax.
Value-added tax - Wikipedia
This country definitely needs a simpler tax code, either a flat tax or something similar to a VAT tax. Warren Buffett famously went on record that it wasn’t fair that his secretary had a higher marginal tax rate than he did. He failed to point out that he had a ton of lawyers that squeezed every deduction out of an overly complicated tax code. He also spends a ton of money lobbying government to put more loopholes into the tax code to benefit his investments.
I imagine the people that would get impacted the most by the increased size of the IRS will be the middle class and the small businesses. My coworkers who seemed to get audited every other year were the ones that tithed to the church and charities at a high percentage.
When the ACA was implemented over a decade ago, it was actually supported by large corporations such as Walmart. They knew they would be able to afford the massive overhead involved in implementing new government policies. While their small and medium sized competitors would have a difficult burden trying to afford the overhead needed to administer all the new government regulations.