This isn't an ideal solution, but a practical one. A simple hack for the U.S. would be to make congressional votes secret. Yes, this means congress people would be less accountable, but think about where their accountabilites lie. These people are far more worried about their parties' strongmen and sponsors than their gerrymandered constituents.

Impossible to implement in the present U.S. climate, but more idealistic is to divide the US into 50,000 person districts (greatly expanding an individuals access to their rep), then group those into evenly sized super districts. The reps choose from among themselves a super rep to attend congress, who they can recall at anytime. This should make gerrymandering more difficult, and dilute the effectiveness of corporate donors while increasing the influence of individual voters.