In 1992, Colorado voters passed the Taxpayer’s Bill of Rights, or TABOR, the nation’s strongest tax limitation law to this day. For those who are unfamiliar what TABOR really does, this amendment to the Colorado Constitution allows government spending to reasonably increase using a formula of population growth plus inflation. Excess revenue, known as the “TABOR surplus,” must be refunded to taxpayers. If state government wants to keep the surplus, or raise taxes, voters must approve. That is exactly why progressives abhor TABOR. But the truth is, a little north of 60% of Colorado voters approve of TABOR.