IMO every other issue in congress stems from blatant conflict of interest like this, and like donations. To a point where even if youre a single issue voter for something like healthcare, or budget, etc, this is still the first step to resolving your concern. How are drug and health insurance prices ever going to be regulated in favor of those that need it, if representatives financially benefit from doing the opposite?
People elected to federal government are already entitled to salaries they can comfortably live on. And they should really be living on that exclusively while serving.