The point about "karensdag" isn't quite true as the max compensation for it is significantly lower than 80% of your salary (afaik it's 810 SEK for that day).
Didn't know that. 810 SEK for a day after tax represent a 80% monthly salary of around 30k before tax if my math is right, which is slightly lower than the median income which is 32k. That might be significant lower than for most people on HN. It would be interesting to know how they determined that number and how many people that requests the money are hitting the max.