MIA is a cesspool that is also the biggest employer in Dade County which is dominated by a bunch of corrupt politicians. They use the airport as their personal bank machine.
Want to run a business with contracts with the airport? Hire an incompetent relative of a Dade County politician to do nothing.
Electronics theft was looked upon as very lucrative. I don't know how big recently. The drugs are problably the biggest still. American Airlines had a big bust a couple of years ago. It involved ramp crews, ( together as teams), assigned to certain flights,( by payoffs), and getting the contraband. DEA/Customs/Marshals busted a huge amount. The sick thing is that they really only caught the small ones. When the undercover guys tried to hire the biggest crew teams for a sting, they laughed at the agents. The US Goverment couldn't afford their price, they never got caught. There are enough stories of rampers living in million dollar homes and others who have disappeared.
The best story I have found can be found at this link. Enjoy.
http://www.miaminewtimes.com/issues/...tml/page1.html