Kaurismaki's most biting critique? (spoilers)

So, the film opens with a quote from the book that Iris received for her birthday: Most likely they have died of cold and hunger, far away there in the forest. It closes with a song about the 'flower of love', frost killed my love. When you give everything only to find disappointment, the burden of memories gets too hard to bear ... and one commits murder.

The first person Iris kills is the wealthy man (Aarne) who treats her like a whore to be screwed and paid off. Then she kills a random guy who has the misfortune to try and pick her up after her 'flower of love' has died. He must be an unwelcome reminder of all the men who never asked her to dance until Aarne, who treated her like dirt. Finally she kills her parents who deny her any joy in her life, treat her like a skivvy and then throw her out when she's most vulnerable. Seems to me a biting critique on wealth, poverty, male-female relationships, deprivation and bad parents. All served up in the arena of a poor working class girl.

I give my respect to those who have earned it; to everyone else, I'm civil.