If we look at the January 6 storming of the U.S. Congress and analyze the people who were engaged in that, it turns out many were middle class. Many did not suffer deprivation. Yes, while it is one intervening variable that I think can drive extremism, it would be a mistake to chalk it up as a causal variable.
My concern is that this will cause us to have massive spending policies to somehow alleviate violent extremist thoughts. I'm not sure that taking people out of deprivation would necessarily remedy that, nor, as I say, for the lots of people in the middle class who hold objectionable or even extremist views.