@gnat stated the reasons why this is like it is:
While we value good questions (and asking a great question is
absolutely an art), we want to explicitly encourage people to provide
the best possible answers. Without people interested in providing good
answers, the questions are moot. We know that answers have more
intrinsic value than questions, and the reputation balance should
The question asker already enjoys a substantial benefit beyond
reputation gain from upvotes on their question — namely, they get
great answers to their question! Thus, the asker shouldn’t need as
much reputation gain.
Maybe, modyfing the rep gain to equalize answering and asking upvotes has more sense here on Meta. Why?
Because, here on meta, a downvote has become a sign of I don't agree with the question, suggestion, feature request, bug, etc. being described in the question, rather than the question is unclear or not useful. So, a good question has even more importance.