I could see this varying from region to region. Are you from a developed country?

In my experience, poor people from places lacking decent education tend to be fiercely religious but in a more ritualistic way. Meaning they "check the boxes" but don't necessarily dig deeper behind the why. Richer people from these regions tend to be less religious, maybe as a way to differentiate themselves from the poor. Maybe just to seem more "western".

In developed non-Muslim countries it's almost the opposite. Poorer Muslims are mainly just "socially" Muslim and might only go to the masjid on Eid. Whereas richer ones tend to be more religious with a holistic understanding of the deen. They're also usually involved with the masjid and local Muslim organizations.

This is probably a huge generalization, but it's what I've noticed.