By now it is a theological dogma among Republicans that cutting marginal tax rates for the wealthy will incrase revenue. But if that’s the case, why does the Republican budget make any budget cuts at all? Why not just keep cutting marginal rates and using the extra revenue to pay for Medicare and Medicaid? If you don’t get enough revenue to make up the gaps, then cut again!
Either Paul Ryan believes in the Laffer theology, in which case his plan is incoherent. Or he doesn’t believe in the Laffer theology, in which case he’s a sadist. Your mileage may vary.