Two percent per month? Did these people even stop to think what kind(s) of legal investments can generate that kind of return, year after year, for ten years? Or were they just so blinded by greed that they didn't care?
FWIW greed isn't necessarly a bad thing. Greed that pushes you into illegal acts - or even turning a blind eye to them - is the real problem.
Don’t forget, they also paid income taxes on the phoney profits..