Constituents
Legislators are responsible to their constituents - which SHOULD mean that they spend a majority of their time with them. So the rule here would be - the Congressman will only meet with constituents - and no one else (why would they need to meet with anyone else?). Also, they need to spread their time to meet different constituents - so they can only meet the same person twice per month (max).
Lobbyists would need to be a constituent in order to meet with the Congressman.
Congressmen would be prohibited from discussing any country business with someone that is not their constituent - even outside the Capital building.
In a public forum (their committees), they could speak with whoever they invite (or subpoena).
Campaign finance
In order to limit the election cycle, fund raising would be limited to 1 (election) year. That year would start when Congress is seated (Jan 20) and last until 1 month after the election. At that time, all campaign funds would be required to be turned over to the National parties.
The Party would use this money to fund ALL of their candidates. NOTE: The Party would pay the campaigning costs (provide the accounting) - and NOT give cash directly to a candidate (or possibly a small stipend to live on ...).
If a Congressman were found to have kept money, or to fund raise outside of the election period - they would be suspended from the party, until they gave up the cash back to the party.
The Government would provide a public equivalent for Independent Candidates (possibly have Government-approved private companies).
