This kind of ballooning makes me think there should be a rule for propositions (and maybe most funding in general) that when allocating funding for XYZ, there m

This kind of ballooning makes me think there should be a rule for propositions (and maybe most funding in general) that when allocating funding for XYZ, there must be clear criteria upon which the funding is removed. Like if the proposition had said "It'll probably cost $33B and take under three hours, and will be canceled if the estimated costs exceed $50B or the estimated duration exceeds 3 and a half hours."