Politicians who deviate from the core platform should get no money or support from the national party.
Stand for something.
Me too. And you make a clear case.
Unfortunately, you would have a very regional party if even that, certainly a minority one.
Since FDR accelerated under LBJ the public has been trained to expect their time at the taxpayer trough. Whichever gaggle of politicians can get them there an electoral majority will support.