Perhaps if you'd have read any of AG's links rather than complaining about them, you'd understand that the price of goods and services are inflated by an average of 20-25% due to the effect of income taxes. Remove income taxes, the price drops. Add the sales tax on top of that, and the price settles down to being within a couple of percentage points of today's prices.
Your effective purchasing power also goes up. The FCA essentially "untaxes" the first X dollars (based on family size) you spend. Your savings becomes tax free. And most of all, you and your descendants are free of the IRS forever.
Your prognosications about future price levels are hypothetical. No sale.
Why are you still telling this lie?
Individual income taxes will just be paid to the employee, not the state & feds. Result: No change in business costs.
Corporate income tax is less than 20% of individual income taxes. Furthermore they are not paid by Subchapter-S's, LLC's, or many small C-Corporations. Result: No change in small business costs.