Earlier quoted context omitted.
You don't have a generalized cancer, you just have a small tumor. All is good.
You're very confused. Look at this chart: http://images.rcp.realclearpolitics.com/379824_5_.png Poverty is the cancer. Capitalism (more specifically, wealth-creating economic growth) is the cure. Don't bemoan the treatment because it's not perfect.
The problem usually is what people mean by "capitalism". In the last decades, too much people equate neoliberalism to capitalism. They are completely different, as neoliberalism is closer to corporativism and fascism than actual capitalism (the state needs to spy you, wealth redistribution is bad, companies have the same rights as people, ...).
Public health care, compulsory education, the rule of law are the source of wealth creation. For that you need people with the freedom to pursue their business and their careers, but also progressive taxes and wealth redistribution.
Capitalism is a word charged with a too much political charge to get reasonable discussions.