They do? Global poverty is at an all time low. Things only the 1% had 10 years ago are now in the hands of almost every single individual, information no one had access to 30 years ago is now available to everyone in milliseconds. I'd say capitalism is doing just fine.
The problem is that capitalism has been so successful that everyone feels entitled to its gains instantaneously. Because of global trade wealth can easily become concentrated because market expansion pushes up capital availability and equity of people who have it. Most people in the top echelon of wealth hold it in stocks. That's why when we have a crisis (like 2008) the wealth gap collapses.
The problem is that capitalism has been so successful that everyone feels entitled to its gains instantaneously. Because of global trade wealth can easily become concentrated because market expansion pushes up capital availability and equity of people who have it. Most people in the top echelon of wealth hold it in stocks. That's why when we have a crisis (like 2008) the wealth gap collapses.