Isn't this the same basic principle that drove American suburbia? Expand the outskirts with building houses on bigger plots of land and empty the city centers. It just seemed to have killed city centers in the US.

Granted that Finland has a very different culture (disclaimer: I live in Sweden) and we aren't in the 50s anymore to invest heavily on a car-centric society but incentivising people to move away from city centres can have unpredictable consequences 20-50 years down the line.