I think I understand where you are coming from. The asking process should get similar reward with the answering. However, I think we have to look at the input.

It takes less than a second to ask a question. For example, I posted a question that has been bothering on my kind since yesterday. The question just came and I just typed it and that was all.

However, in answering a question, I think a greater effort is needed. The one answering the question would have to think of the best way possible to make the idea understandable. It would take a greater deal of effort to bring up an acceptable answer.

Also, the length of questions might just be a line or two but in providing an answer that would properly deal with the question, you'd have to do more. I think this is why answers get more upvotes.