I don't think the pay increase (37%) at Abu Dhabi TWR/APP should be kept as a secret so here's the annual starting salary in AED (Dirhams) for the Serco contract:
Basic 170.000
ATC allowance 30.000
Cost of living allowance 73.200
Money in your hand = 273.200 (22.767 monthly)
Housing 113.400 (if cost of housing is less the balance will be paid)
Utilities 6.000
Schoolling for up to two children 76.000
Travel allowance varies depending on family status but roughly 10.000 - 16.000
Basic medical cover, visa/labour cost, loss of license and end of service gratuity included in the contract.