The NHS study cited in the post is pretty strong evidence that precarity can increase support for proto-fascist politics.
But that rationale falls flat in the US context, as many analyses show that the median income of MAGA supporters is quite high. Right-wing extremism in the US isn't really about revolting peasants, it's about an alliance among multiple groups up and down the security-precarity spectrum, with very strong support from the top 5% and even more support from the top 0.1%.
Just because precarity can be a causal factor doesn't mean it's the only factor or even the dominant factor in the US.
And I wouldn't be surprised to see the US regime move into full money-printer stimulus mode to finance its wars of choice and give its base a little financially security before this year's midterm elections.