Actually, at least in Helsinki part of the rising costs of housing in the centre has been attributed to so called vacation housing, where apartments have been bought by rich people from abroad or rural areas, yet occupied maybe a couple of days/weeks a year, or rented out as an airbnb flat. I'm not saying its a major factor, but still an indicator that theres more than enough money to spend for some people, for them to take out from the 'necessities' pool, just to achieve some form of luxury.