The people who believe that wealth is not unlimited are the same people who think that if one person is becoming wealthly it is done so at the expense of others. This is the belief that encompasses the idea that, "the rich get richer and the poor get poorer." Which is totally false because the standard of living for any society is based on the amount of goods and services produced. So if someone is creating lots of wealth in the form of producing lots of goods and services then that person is making everyone's life better because we now have more goods and services to consume.