Well, yes, it is true that in other countries who have made changes like this, they grandfather them in so that people who make life plans based on a certain set or circumstances won't find themselves cut loose. Australia, for example. Those countries, however, are not led by Stephen Harper.
Count yourself lucky in one respect -- you've been working and saving money. Another group of people, students, find themselves cut off from an avenue of immigration which I am sure many counted on taking advantage of. These people chose Canada, often over other countries that would have let them immigrate, spent huge fees to study, and suddenly found that the category they would have applied under no longer existed. It's legal, the government of Canada has the right to do it, but it also stinks.