From 2016 so Dubai may have had a working sewage system for a year, so I could be wrong.
> Dubai: The emirate of Dubai will get a new deep tunnel sewerage system costing Dh12.5 billion in the next five years to replace more than 121 sewage pumping stations.
Pumping station meaning tankers transport the waste away.
>Restaurants obviously being the most important metric
This reminds me a bit of Eddie Izzard's impression of the Queen: "A plumber? What on Eaaarrrthh is that?" Not everyone can eat at a restaurant nightly. Not everyone can eat. And some of the reason for that is designed into the current system.
On which basis?