In addition to the relatively small salaries, the cost of living is pretty high in the capital area. If you do move to some of the smaller cities your price-to-value ratio for living will go up way faster than trying to reach the same ratio by instead hunting for a larger salary around Helsinki.
But even then there's the purchasing power which is also relatively low everywhere. It depends on what you spend your money on, of course, but generally unless all you buy is telecommunication services everything feels pretty expensive. Moreover, the price difference to nearby countries and to the rest of the Europe is often so much higher that even if I'd very much like to support local Finnish business often there's just no way I'm going to justify that to my wallet.
