It might lead to cutting taxes, but it may also just mean the budget gets allocated to the next most valuable thing (or whatever it was already going to get spent on). Consider that if a project is pressing enough to get a government budget now, then it’s probably something the government feels is popular and will produce credit for them (or help them avoid blame). Those are the kinds of things they might want to control for themselves, even with a Kickstarter mechanism. Hence, Kickstarter winds up being used for the kinds of things government, for whatever reason, neglects, and government continues to focus on the kinds of projects it’s already doing.
It might lead to cutting taxes, but it may also just mean the budget gets allocated to the next most valuable thing (or whatever it was already going to get spent on). Consider that if a project is pressing enough to get a government budget now, then it’s probably something the government feels is popular and will produce credit for them (or help them avoid blame). Those are the kinds of things they might want to control for themselves, even with a Kickstarter mechanism. Hence, Kickstarter winds up being used for the kinds of things government, for whatever reason, neglects, and government continues to focus on the kinds of projects it’s already doing.