Citizens for an Alternative Tax System

Citizens for an Alternative Tax System (CATS) was a national tax reform public interest group in the United States active from 1990 until 2005. The organization's Las Vegas chapter proposed "that Congress should eliminate the IRS and all income taxes, corporate and personal; estate, gift and inheritance taxes, plus many excise taxes; replacing them with a single-rate tax on consumption—a national retail sales tax.

Source: Wikipedia — Citizens for an Alternative Tax System (CC BY-SA 4.0)