In Australia Land is not scarce (except for the capital cities), We have the most sparcely populated land mass on earth. All people have to do is get out of the idea that they are trapped in the capital city.
There are so many fantastic towns dotted around Australia that would provide great quality of life to famililes outside of the cities.
And a lot of land that is not inhabittable. Then there is the cost of living in these towns.
Agree we do have a lot of great towns and I in particular am one that could not return to city living, but for most people country living is not where the work is (except for mining of course). So although some will complain about the affordability of housing, they are unlikely to move to locations where although they can afford a house, they may not get employment.
What do our younger members here think? Is moving to the country on your plan if you could not afford a house within transit distance to the city?
Same issues apply to Asia, people still flock to the cities from regional areas to get work.