Getting back to the original question:

Any general purpose lawyer can handle a plea bargain in a criminal case. But, law is highly specialized--and very few lawyers specialize in criminal law. That's because 95% or more perps don't have the money to pay a high-powered lawyer. What's more, few lawyers have extensive trial experience. Trials require dozens of hours of preparation. And since the government holds the high cards, there's a very good chance that the trial will end in a conviction for the perp--especially if the perp is a high-profile Mafioso. Try collecting your legal fee from a Mafioso who's on his way to prison because you didn't win an acquittal for him.

So, it comes down to supply and demand--and the supply of highly qualified criminal lawyers willing to go to trial on a complex RICO defense for a known mobster is very low. I'm guessing a RICO defense would run half a million dollars.