That's why both parties seem to lack a cohesive argument.
In TPS & my summation, Government can and should be spending much more, or taxing much less. Inflation of 0.0-1.9% which is what we've had per annum the last decade is not high enough to maximize our resources: full employment, labor & capital.
This is the great fallacy of the political paradigm; that you must either tax and spend more, or tax less and spend less. We are advocating for spending more and taxing less.
Let's look at one example of the Government spending more. By implementing Medicare-for-All, this would be a highly deflationary event. Right now the U.S. spends 17% of GDP on healthcare. Private health insurance operates at a 25-30% overhead compared to Medicare 5-7%. Some of this cost is inefficient medical billing on the insurance side and medical office side. Needless to say there is a lot of 'hole diggers & hole fillers' in the healthcare industry.
In a more efficient healthcare system, you would see tens of thousands of unemployed from the inefficient system such as; medical billing 'coders' out of a job - a highly deflationary event. At the same time businesses would save on the HR expense of no longer managing health insurance policies and paying for their employees healthcare.
These factors are the reason why you wouldn't raise taxes: higher short-term unemployment, and worry about deflation. You would want to encourage businesses to re-hire and the best way to do that is to lower their expenses (healthcare - ✔️) and taxes.