Rather than threatening to pick up our ball and go home when we lose, let's acknowledge that the country is divided on what we should be doing. It's hard to compare the different ideas because we have no control group to compare to when one party's ideas were in use. Comparing different times periods is difficult because the US is part of a global economy and has technological and societal changes.
So I propose we let the Democrats and Republicans come up with their own plans for taxes, entitlements, health care, and any other parts of the budget where practical. Add in a third non-partisan group of experts for an alternative plan.
Then we have a referendum with instant runoff voting. Each state gets to chose which plan it wants to implement. In order for a plan to go into effect it must have some threshold of states/population.
The debt is then split proportionately by population to the groups of states and we let the experiment run its course. Changes to the plans must be approved by the voters in the states currently on the plan. States can change plans on the same schedule as the Senate. 6 years, staggered so that 1/3 happens every 2 years. Continue until only one plan remains.