That’s part of it another is that the right offers some easy answers to some very complex questions. They aren’t the right answers but they’re easier to wrap your head around. As prosperity drops, the time, effort and resources the average person can commit to understanding the complex problems facing their country also drop. This means the easy answers take root easier, and spread further and faster because the less informed are less resilient to them.
We lefties have some easy answers and they feel quite right, too. Eat the rich. But I guess it’s not that famous in the less educated social stratum - “What if I am one of the rich, after I won the lottery?”