According to the Mercer survey, Tel Aviv remains an outrageously expensive city. The survey barely addresses quality of life, which despite skyrocketing prices is relatively low in Tel Aviv, certainly much lower than in Dubai, Abu Dhabi, or Riyadh.
The main reason for such high prices is, of course, monopoly. The problem is the bureaucratic red tape that serves as an obstacle to any business venture, and the existence of various commercial quasi-monopolies, such as import agents, real estate zoning regulations, and utilities.