The stats are all over the place, as to how many people are cured of cancer, meaning they live more than 5 years without detectable disease. But for many cancers, the outlook is likely death. A recent study says half of cancer patients spend their life savings within two years of diagnosis. We don't know the numbers of people with likely fatal diagnoses and very hard to treat cancers, or the quality of life they have during those last two years, but is it fair to their families when inherited wealth is shown to be the only reliable way for people to maintain or increase their social status? Why do people do this to their families? I think religion has something to do to this. Also it's not a coincidence that most cancer treatment centers are run by religious groups.
Here are some stats about cancer and also a link to an article about the recent study (including a link to the original study)