In the US, economic growth does not seem so hard to achieve. If you look at the GDP of the United States, it seems to just grow and grow. Even the multiple crises along the way have only had minor effects. The graphs of other countries look far more bumpy and occasionally stagnant, which would suggest that they have real issues with getting the economy going on. But in the US, economic growth does not seem to be a problem.
Here's the US GDP, followed by e.g. the GDP of Denmark.
These figures would suggest that economic growth is not a problem in the USA. And yet, as an outsider, I often hear in particular conservatives but also a lot of libertarian commentators constantly say that taxes need to be cut so that the economy can grow and so we can have jobs, jobs, jobs, etc.
But why are those things even necessary? How much more economic growth can you have? Even the unemployment rate is at 4 %, which is about as low as it has ever gotten in the US, at least for the past many decades.
To sum it up, my question is, why is cutting taxes (as was recently done), boosting the economy, and creating jobs such an important political agenda in the US, when it seems like they are already doing perfectly fine at those things? Does it not make more sense to keep the current level of taxes, given how they aren't really hurting the economy, and in turn using those taxes to fix other more prominent issues that plague the US society, such as low social mobility and inequality? The argument that taxes will prevent economic growth doesn't really apply when all data suggests that the current level of taxes are perfectly suitable to sustain economic growth and a low unemployment rate, so why was there a need for a tax cut?