I dont see the problem with people leaving an overcrowded market. It should be applauded.
It was the late fifties when they tried to set up Albury-Wodonga as an alternative to slumming the cities but the 'big business' developers fought it for profit motives.
If the infrastructure elsewhere can cope then that should reduce pressure in sydney.
I was in brisbane in early july and had someone complain about sydnyites moving there and could only laugh at how spoilt they have been for so long.
Oh and as for upping the interest rates, have you sought help from someone.