It's a tough call as far as comparing net worth. For one thing,you have to account for inflation,and Carlo became a Boss back in the late fifties,when you could buy a new car for less than a MacDonald's worker makes in a month today.
Also,even though Paulie did push the Family into more white collar type businesses ,he knew that no Mafia Family could ever be 100% legitimate.
The biggest income source for any Family is ,and always will be,gambling and loansharking. These are often referred to as the twin pillars of organized crime. Most soldiers are not capable of running any sophisticated businesses. Granted,there are a few exceptions,but for the most part,guys that get made make their living by gambling,shylocking,hijacking,dope,protection,etc.
For a Family to hold power and maintain respect from other Families,you need wealth and a ready army of enforcers and killers. So not only does the "blue collar" crime bring in a lot of cash,it also brings with it the type of guys that are more comfortable with splitting skulls than they are with splitting stocks