Sen. Mitt Romney unveiled a proposal this week that would dramatically expand the child tax credit, giving parents up to $4,200 per year for every child under the age of 6 and $3,000 annually for older children up to age 17.

Several conservatives have already come out swinging against the plan — all for good reasons. Sens. Marco Rubio and Mike Lee are concerned the plan would increase families’ dependence on the welfare state and compared it to a universal basic income program typically supported by the Left. The American Enterprise Institute’s Scott Winship is worried the program could incentivize poor social choices as well as good ones since the child allowance would be available to all parents, regardless of whether they’re married or employed. Other fiscally minded Republicans have rightly pointed out that the $66 billion plan would essentially serve as a net tax increase.