Much loud GOP bellowing goes into demanding ever-further tax cuts (= reductions in public sector GDP).
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Kansas gave it a try.
Kansas cut the public sector more harshly than any of its neighbours.  It killed job growth.  Kansas grew, on average, at 1/2% while all of its neighbours were growing at 2%.
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Conclusion:  They were on the wrong side of the Rahn curve peak.   The self-induced public-sector depression in Kansas was a stark mindless-ideology-driven policy failure.
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Nobody ever says that the money spent building the subways from 1948 - 1983 was a mistake.  On the contrary, it was one of the wisest investments ever made.  Everybody wishes they had built ten times as much.
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That public sector investment has generated many times as much private sector economic activity and benefit.
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Right now, tax revenue as a % of GDP is at a 60 year low.
We desperately need to build more transit.
Taxes need to go up, not down.

We are nowhere near the golden-goose-killing tipping point.