Take this income calculator that compares your yearly income to the rest of the world.
This is a good (global) reality check. Guilt is not, however, the intended outcome. An increased understanding of our wealth, prosperity, power, privilege, and the like should push us to empathetic, creative, and empowering action. Sitting in guilt for what we have is, finally, it’s own kind of privilege, and it is not life-giving or inspired.