If you really want to drain the swamp, try these:
Eliminate the Electoral College.
Publicly fund political campaigns. Private contributions go to the general fund, and any contributions from individuals, groups or corporations that go to candidates are considered bribes and are prosecuted.
Require that all campaign material focus on the goals and achievements of the candidate, not on negative attacks on their opponent.
Institute a lifelong ban on elected officials becoming lobbyists. Likewise, prohibit those employed in an industry from joining any regulatory body for that industry, unless they can prove there is no conflict of interest.
In this era of teleconferencing, Congress meeting in person is largely ceremonial. Require all Members of Congress to maintain their only office in their home district. Not only would this eliminate the duplication of effort in maintaining two offices, it would make them more accessible to their constituents.
Require that all communications between elected officials be recorded and publicly available. Eliminate the deals struck at cocktail parties and in backroom discussions.