I am willing to wager that more action will be seen with regards to LGBTQ channels being demonetized than conservative channels. Google never really tried to hide their left leaning biases.
Anecdata, a lot of the popular conservative user-generated content on YouTube I've come across tends to trend negatively towards "black people are causing all this crime and police drama", "I don't hate LGBT people, I just think their sexual preferences should be criminal again", etc.
I don't think YouTube is purposefully demonitizing videos on conservative fiscal theories.
I follow liberals and conservatives on Twitter - this is the first I've heard of them "demonetizing" anything associated with liberalism - everything I've been seeing is them "demonetizing" content by conservatives.
I don't think YouTube is purposefully demonitizing videos on conservative fiscal theories.