[Nutmog]

I'd say it's fair for candidates to break promises. If voters keep voting for them and their party despite seeing that happen, then it means voters don't mind broken promises. This is what's nice about democracy - you don't have to argue about too many rules, the rules evolve naturally. For some reason it turned out that keeping promises wasn't a natural rule that voters wanted. The same goes for resigning. If they don't resign and are still re-elected or their party is still re-elected then that reflects what their constituents want, not some artificial rules that some unelected rule-maker (who would that be?) decided on.

The US system seems to be doing quite well. The majority of the population doesn't care at all, and their votes don't count. Those are people who either always vote for the same party or don't vote at all. The important decision then comes down to the minority of people who are most interested in the policies - the swing voters. Isn't that quite an efficient division of labor?