Interesting, I live in Espoo, and usually, I'm hesitant in taking a taxi from Helsinki city center. 20 min ride (17km) costs me on average 45-50 euro. I don't think this is cheap.
(Finland: pick up 5,90€ + 1,6€/km/1-2 people vs. Brussels 2,40€ + 1,8€/km/1person or 2,70€/km/2 people).