Walk, Don't Talk on Per Diem
Let the DFL set whatever per diem they want, and draw it without receipts. The GOP should huddle and agree to obtain and present receipts for their meals and incidentals, just as they would have to do in the private sector.
After the session, run the tape, calculating the average DFL vs GOP payouts. Also show how much was paid out for weekends, when the Legislature is not usually in session.
Ditto the housing allowance. Spend a few nights in a budget hotel now and then. Maybe the GOP could arrange for some group rates for its members to save still more money.
Just do it, and let the DFL do the talking, trying to explain their excesses.