I asked the exact question a few days back and from the answers given, got to know musing is trying to prevent a system where there would be abuse.

For example, if the site gave higher upvotes to questions, people would concentrate more on asking questions. Consequently, there would be too many questions with no one willing to answer them.

The way it is now, knowing you stand to earn higher with answers and detailed answers at that, people do more of that.

I hope this answers your question.