It cuts both ways with material forces having the stronger effect from my understanding.

I think it's an oversimplification to phrase it as a one way interaction, and carries the implication that ideology doesn't matter, which would introduce a huge blind spot to one's analysis. In a "chicken or the egg" sense the material world obviously existed first and shaped the ideologies of people and continues to do so. It is ridiculous for liberals (and monarchists, and other idealists) to view their ideals as done sorry of "triumph" over the material world without further analysis (which would obviously expose them to the uncomfortable contradictions that they've created for themselves).