Neal McCluskey writes for the libertarian Cato Institute about the potential danger of increasing the federal government’s role in school choice. He focuses on the $5 billion scholarship program proposed by U.S. Sen. Ted Cruz, Rep. Bradley Byrne, and Education Secretary Betsy DeVos.

School choice is about individualization and freedom, and almost certainly that is what DeVos, Cruz, and Byrne want. But federal initiatives are a terrible way to deliver that. The reality is that what the feds fund, even indirectly, they inevitably want to control. DeVos, Cruz, and Byrne specifically acknowledge that historical reality in federal education policy. They write, “A series of administrations on both sides of the aisle have tried to fill in the blank with more money and more control, each time expecting a different result.” Note that the primary vehicle for that control, the Elementary and Secondary Education Act, started aimed just at funding low-income districts. It eventually became the uber-controlling No Child Left Behind Act.

DeVos, Cruz, and Byrne are looking to skirt the control problem, sticking with tax credits instead of vouchers, and letting states opt in. But not only is this unconstitutional—taxes are authorized to execute specific, enumerated powers, not to lightly engineer state policy—it won’t, ultimately, prevent encroaching federal control. If enacted, the credit would spur people to demand their states participate, and as more schools benefited from federally connected scholarships all schools would be financially pressured to use them. But the federal government will have the power to decide which state programs are or are not eligible, and on what grounds.