These 419 scammers operate in the culture that is very tolerant to scammers.
That's another reason why they chose such a bad line of business.
BTW, I don't think scammers are making big $$$. Scam doesn't pay well in long term.
-most of them make nothing by U.S. standards ,but are rolling in dough by local standards. Many times the scamming 14 year old, makes more cash than his father.
-The big guys who recruit the teenagers, and provide computers + internet access, are rolling in dough even by U.S. standards.
Most of these kids use net cafes by the hour or quarter hour, so if they don't achieve a net-positive scam, they take a loss. Not sure the 'big guys' are making money from crime, just operating an internet access business.