The Wisconsin news today will be that an historic (however that’s defined) deal on spending taxpayer dollars was enacted into law after a deal between the Republican Legislature and Democratic Gov. Tony Evers.

What would have been really historic is what is in place in Colorado, but not in Wisconsin because the incumbent party refuses to enact it. Daniel Mitchell explains:

The Center for Freedom and Prosperity has a video on spending caps that focuses on international evidence, such as Switzerland’s debt brake.

Here’s a video from the American Legislative Exchange Council that that looks at a successful domestic spending cap – Colorado’s Taxpayer Bill of Rights.

Here’s the short and simple explanation of how the Taxpayer Bill of Rights (TABOR) constrains spending.

Under the constitutional provision, state tax revenue cannot grow faster than population plus inflation. Any revenues above that amount have to be returned to taxpayers.

And since the state has a requirement for a balanced budget, that means that spending also can only grow as fast as population plus inflation.

Has TABOR been successful?

Colorado has out-performed other states, as measured by the growth of personal income, which presumably is a key variable.

Another key variable is the amount of money that TABOR has returned to taxpayers. Here are some excerpts from a new study, authored by Professor Barry Paulson and published by the American Legislative Exchange Council.

This year, the Colorado General Assembly announced a taxpayer rebate of $3.6 billion in surplus revenue. …These rebates are mandated by TABOR, a fiscal rule that limits the growth of revenue and spending at all levels of government and requires that surplus revenue be rebated to taxpayers. …It is important to understand why TABOR has been successful and resilient. TABOR is designed to limit the rate of growth in state revenue and spending to the sum of inflation plus the rate of growth in population while allowing a majority of voters to increase the revenue and spending limit when needed. This prevents many new taxes increases. If the state government collects more tax dollars than TABOR allows, the money is returned to taxpayers as a TABOR refund. …As a result, the state has not incurred deficits or accumulated debt as much as other states, like California. …tax rebates…totaling $8.2 billion since TABOR passed in 1992, has strengthened Colorado citizens confidence in the TABOR Amendment over the years.

The last sentence is key. TABOR has resulted in $8.2 billion in tax rebates. More important, it has prevented Colorado politicians from spending $8.2 billion.

Taxpayers seem to understand that TABOR is a very important protection against over-taxing and over-spending.

Here are some excerpts from a column by Ben Murrey of Colorado’s Independence Institute.

Every time voters speak on key issues related to TABOR, they send the same unambiguous message: “Leave TABOR alone and let us keep our money!” …In 2019 after voters gave Democrats unified control over state government, legislators thanked them by sending Proposition CC–which would have permanently ended TABOR refunds–to the November ballot, where Coloradans soundly rejected it. …In 2020, voters had the choice between two competing citizen-led ballot initiatives. One would have raised taxes and repealed TABOR’s requirement that Colorado maintains the same income tax rate for all taxpayers. The other, put on the ballot by my organization, Independence Institute, reduced the state’s income tax rate from 4.63 to 4.55 percent. The latter passed with a wide margin. The former failed even to gather enough signatures to appear on the ballot. …Fast forward to 2022. …Initiative 63 would have taken TABOR refunds from taxpayers and given the money back to the state to spend on public education. Like the tax increase measure from 2020, the initiative failed even to make the ballot. Conversely, Independence Institute worked to put Proposition 121 on the ballot. The measure won with more than a 30-point margin and lowered the state income tax rate from 4.55 to 4.4 percent, saving taxpayers over $400 million per year.

Colorado voters don’t always reject tax increases. At the local level, such measures often are approved.

But Murrey’s article shows that voters want to preserve TABOR and don’t want to give state politicians a blank check for more taxes and more spending.

Needless to say, a TABOR-style spending cap would be very helpful in other states. And at the national level as well.

P.S. The ALEC study looked at 30 years of evidence. There’s also a study that looked at the first 20 years of evidence.

Mitchell follows up by saying that balanced-budget requirements …

… are mostly ineffective.

Or, if you want to be pessimistic, such rules actually give politicians an excuse to raise taxes.

What makes TABOR so successful is that it is designed to control the variable that really matters, which is the growth of government.

TABOR basically tells politicians they can increase spending every year, but no faster than population plus inflation.

Has it worked perfectly? Of course not. But it has returned more than $8 billion to the taxpayers of Colorado.

And Colorado definitely has out-performed other states economically, as measured by the growth of per-capita income.

This is the approach we need in Washington. Heck, even international bureaucracies have acknowledged that spending caps are the only effective fiscal rule.

It is also worth noting that the German government recently endorsed that approach for Europe, which is a positive development since the European Union’s anti-deficit rules obviously have not been effective.

So I’ll be very curious to see whether any 2024 presidential candidates decide to embrace this approach (whether they are sincere is a different issue, needless to say).

No one I’m aware of in the state GOP has advocated, or even brought up, a TABOR mechanism as something Wisconsin should do. Maybe that lack of difference between Republicans and Democrats is why voters keep electing Democrats to statewide offices.