Unfortunately, I think Congress is too far gone for any newcomers to effect positive change. It is all too common for well-intentioned inductees to the legislative halls to find, once they arrive, that the "good ole boys" system is too well-entrenched for them to dislodge.
Despite high hopes, they find, too often, that "tit for tat" is the rule of the day... quid pro quo... if you want something, then you have to give something up. I think you are naive if you feel confident that an influx of new politicians will be able to make any substantive changes.