Everybody who knows about my Dubai move always reminds me of the construction workers. The government here is surprisingly efficient at responding to complaints, and has set up an anonymous hotline to report any cases of abuse. Most of the horror stories come from the early days of Dubai (back when 25% of the world's cranes were here) and, currently, Qatar, future host of the Soccer World Cup.
Here's a picture of the kind of accommodations used by construction workers. They feature big rooms (4-8 people, much like a hostel), and the $200-per-month rent includes 2 meals and transportation to the worksite via shuttle.
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Gas is less than $0.45 per liter, or less than $1.80 a gallon. The most popular vehicle is the Toyota Landcruiser, bar none. I haven't seen too many old Mercedes, other than some punctual W116, W124 or W126.
Supercars... well, you have all the exotics you could ever want.