No, it's the empirical fact that the US is a plutocratic oligarchy. The oligarchy runs the economy, the government, and the media for its own benefit, and is violently opposed to anything that challenges this.
https://www.cambridge.org/core/journals/perspectives-on-poli...
How do you "empirically" prove something of that sort?
I for one look at Trump or the previous Tea Party change in the Republican party as anything close to having a static group of elites controlling the country