Twisted logic

I cannot help but public institutions and their ways of doing things are a mystery to me. Almost every time I have to deal with them, I keep wandering if they are living in separate dimension because I never get into their way of thinking.
Here comes particular example of today, which I feel like sharing with you.
So today I got more deeply acquainted with social health insurance system in Estonia. As I mentioned some time ago, I was ill for a while so I do not get salary for this period, but instead a compensation from health insurance institution. The compensation should come from my social tax paid here. Before I read in the law that this should be 80% of my daily salary, and I decided that it’s a bit of loss, but still ok. But today, after receiving mysterious and small number on my account, I started to dig into it. It turned out that calculation of average daily salary is very-very-very peculiar, and it also takes a while and reading of five times to understand it from that text, what is called law.
But finally I arrived to a correct result which is that they take a salary earned only in Estonia in previous calendar year, and divide it by 365 days, meaning that now they take salary from year 2003! I was lucky that I had some employment in 2003, meaning I worked till June before I left to other place in Latvia. So they took a salary for half year (January-June) and divided it sill by 365 days! If I had worked only for one month, they would still divide it by 365 days, and this would be called my average daily salary for 2004. It looks very logical, right?
It doesn’t to me.
I already mentioned that I was lucky to have some employment in Estonia in 2003, but actually I was bloody lucky :)) Because otherwise my average salary would have been regarded as minimum daily salary less income tax, which makes EUR 4.4 per day. Welcome to Estonia! :)
Feels like this law is written not by person, who has minimal math skills, but by social worker who never gets salary raise, never changes work place, not talking about changing country, so it just doesn’t pop up into mind while writing the law.