The government let us keep more of our money. I personally have $4K more of my salary per year under the Bush tax cuts becuase the entire federal income tax rate was reduced twice. When people have money, the economy grows as does the federal revenue.
In the words of W, which he repeated hundreds of times, his tax cuts were designed to put money in the hands of consumers. That’s demand side economics. Combine that with outsized government growth, and you’ll always end up in a situation with higher prices, shortages, and economic growth that can’t be sustained.