Kippa, your maths is way out. People think that the company housing is "free". It isn't, you are paying whatever the move out allowance is- you just never see that money being deducted from your salary. Hence, if you move out and are no longer taking up space in the company accommodation you get the cash instead.
I don't know why people have such a hard time understanding that.
Also, if you decide to buy a house you too can still have (for now!) the "50% pay increase". So what is stopping you?