Fair Tax.... Tax on sales. No need for reporting income, keeping records, subjecting yourself to penalties, imprisonment and property confiscation. No need for paying CPAs / Accountants! No complex regulations / laws that no one understands and no two “experts” can explain the same way. No need for a large IRS force with investigators, attorneys, judges etc. Employers costs decrease in that they would no longer need staffs of accountants and lawyers to ensure compliance with withholding and reporting requirements.
You can try and simplify individual returns all you want, but business returns will always be complicated.