this actually demonstrates the problem fairly well.

andrew coyne is very upset that the liberals are not carrying through with their promise to bring in proportional representation. his sarcasm is quite intense. it's an impressive display.

the only problem is that the liberals did not actually promise to bring in proportional representation; what the liberals promised was to bring in ranked ballots.

is mr. coyne as equally upset about the prime minister breaking his promise to buy him a unicorn?

http://news.nationalpost.com/full-comment/andrew-coyne-its-not-the-liberals-fault-for-lying-about-electoral-reform-its-yours-for-believing-them