A version of the following commentary appeared in the St. Louis Post-Dispatch.
In his January 30 op-ed for the Post-Dispatch, Kansas political scientist Michael Smith called Governor Mike Kehoe’s proposal to cut income taxes in Missouri a “near carbon copy” of Governor Sam Brownback’s 2012 income tax cuts in Kansas.
But Kehoe’s proposal for Missouri has large and important differences from Brownback’s. It isn’t a “carbon copy” at all.
The single largest flaw in Brownback’s tax cut was a peculiar change that eliminated all income taxes on “pass-through” business entities such as limited liability corporations (LLCs) without changing the tax code for other types of businesses. Even the right-leaning Tax Foundation criticized the provision at the time. Put simply, it didn’t encourage investment; it ended income taxes for one type of business while keeping them for others.
Not surprisingly, many businesses changed their corporate structure to suddenly become pass-through entities. The Tax Foundation found that over 390,000 entities claimed the exemption by 2015, more than double what was projected. These businesses didn’t invest in the state, hire more workers, or do anything other than change their legal status. Tax revenues declined significantly, and little growth followed.
Kansas also made critical mistakes in how it implemented income-tax cuts. The state slashed its top income-tax rate by nearly 30 percent immediately in 2012, with plans to cut even further. At the same time, Kansas’s elected officials failed to rein in spending. The combination of the pass-through exemption, immediate and deep rate cuts, and lack of spending discipline during this period fostered a fiscal crisis that could have been avoided. Even worse, the timing of these actions gave the state little room to adjust when projections weren’t borne out.
Kehoe’s proposal is fundamentally different. It asks Missouri voters whether they want to eliminate the income tax. If they do, the state can then expand and adjust its sales tax to replace the lost revenue. While many details remain to be finalized (and Missourians have every right to be skeptical while awaiting those details), the plan ensures that income tax rates can only be lowered after meeting revenue benchmarks, meaning Missouri would only cut taxes when it has the fiscal capacity to do so.
Setting aside the phasing out of the income tax, addressing Missouri’s outdated sales tax system is long overdue. While states nationwide are broadening what they tax, Missouri’s system remains narrow, with much of what is sold today escaping taxation entirely. Larger exemptions like home sales and healthcare services might make sense, but other current exemptions clearly don’t.
When you buy a book in person at Barnes & Noble or have the same book delivered to your house by Amazon, you pay the sales tax. However, when you buy the same text as a download to your Kindle, you pay no sales tax. Correcting such inconsistencies in Missouri’s tax code can level the playing field while expanding the sales tax base at the same time.
Opponents can point to Missouri’s western border all they want, but Missouri has other neighbors besides Kansas. Look at Iowa, Oklahoma, and Arkansas, which have all cut income tax rates significantly in recent years without any of the issues Kansas had. Look to our southeast border to see Tennessee, a state that has been growing rapidly for years thanks, in part, to having no state income tax. This isn’t surprising, as decades of economic research have shown consistently that states without income taxes grow faster economically than those with them.
As the Tax Foundation, which was highly critical of Kansas’ tax cut, wrote in 2024 about the larger picture of state tax cuts between 2012 and 2022:
In fact, far from tax cuts precipitating a Kansas-like crisis, tax collections have risen more on average in the past decade in the 25 states that cut income taxes (31.9 percent in inflation-adjusted terms) than in the four states and D.C. that raised them (27.8 percent).
The lesson from Kansas isn’t that eliminating the income tax is a bad idea, it’s that implementation matters. There’s no doubt that states without income taxes are growing faster than Missouri, and our state needs a new approach to keep pace in the national competition for families and businesses. Voters deserve the full picture, not an overly simplistic “Kansas” bogeyman, when debating our state’s tax future.
