cotton - Your picture is pretty accurate. I'll add a story from my time on the hill.
During one of our periodic spasms of interest in tax reform, a reporter asked Dan Rostenkowski, chairman of the Ways and Means Committee, what the chances were. He replied. "Niney five percent of the American people are in favor of tax reform. The other five percent are lined up outside my office."
The corruption of the tax system and the corruption of the campaign finance system are deep and enduring, affecting the entire process of public policy, and thriving under Democrats and Republicans, although the specific winners and losers may change.
I wish I could visualize a set of political circumstances which are plausible and could bring about real change. I can't.