Because food isn't free, transport (apart from to/from work) isn't free, internet/phone isn't free (and remember Skype is blocked) and you will quickly discover that schooling is VERY expensive- it goes up every year but the amount Emirates contribute certainly doesn't. If all you ever do is go to work or sit in your 'free' housing then the cost of living won't matter- but you will go crazy in a couple of months.