Bringing parents to Canada is not a right, it's a privilege. It was never guaranteed when people chose to immigrate here. This topic has been covered heavily on this forum and always causes an uproar. Would I love to bring my grandparents here? Yes. Do i understand that elderly people cause a strain on our social programs? Also yes. Think logically and don't react with your emotions. All of these people CHOSE to leave their parents behind for a better life in Canada. We all make choices in life, and you can't expect a whole country to pay for those choices.
And before you start calling people heartless, stop to remember that we are all on this forum to help people immigrate on a voluntary basis and are not being compensated for our time.