Most guys rent out their properties in the UK but i agree the dollar is a real problem, however it has always fluctuated and we are currently at the worst point in 26 years against the pound. In the short term it is becoming more likley for the Dirham to be re-valued or even pegged to a different currency.
The salaries cannot compare to the UK as there are so many iffs and buts however if you own property in the UK and have it rented out then you will be far better off in EK, but if you are sending money back for a big mortgage then the money works out very similar. Dubai is getting expensive but is still very cheap to live here compared to the UK.