Probably because people can work from home and actually afford a house out that way.
Housing is not cheap out here anymore. It might be cheaper than Toronto, but housing has doubled in price in three years and our vacancy rate is as low as Vancouver.
500k for 50 year old split entries. $2/sq ft for an apartment. $3 in close proximity to down town. At 6.49% interest on a 25 year mortgage, that's as much as $1 million (depending on your payment frequency) for a 500k home.
Province also looking at possible levies for those that come here, but work remotely and have their provincial income tax go to province of employment. Those levies would be applied like a property tax, should the come to be.
The impact on people from here that work here and make NS money has been harsh. Single income folks making anything under 100k are screwed without a massive construction boom and regulatory changes.