This is a great questions and there will be many different opinions for sure. Here are some suggestions.
First, there is a lack of accountability, that is, there are too many scandals. So, it would be good if our politicians went to jail, just like any other citizen, if they broke the law. This is why the justice was served when Rod Blagojevich was sentenced to prison.
Second, we need to do something about senators and people in the House of Representatives trading stocks when they have insider information. This prohibition would allow them to focus on their jobs more. Moreover, this is a complete conflict of interest.
Third, we need to do something about all the special interest groups. They influence our politicians too much.
Finally, we need to do something about campaign funding. If money rules, then the average person gets looked over. Is this not why our politicians cowtow to big banks?