You forgot to mention that Reagan had to deal with House controlled by Democrats, and that nothing at all could've been done without compromise. You also forgot to mention that Reagan initiated a radical shift in national policies away from the Great Society socialism of the Sixties and Seventies, whereas GWB came along after two decades of the Reagan Revolution (that he promptly began dismantling).
Given that it is Congress that approves appropriations, pretty amazing that the Republicans in Congress have made no effort to control spending.