Not quite. Consumerism is just as much to blame, but consumerism wouldn't exist without the advertisers. And it is business that drives the advertisers, and the advertisements that drive the consumerism.

In addition to that, American culture brainwashes people that they must be successful and have money, and this message, through Hollywood, has spread further and further.

When people want to be successful, they will do whatever it takes - lie, steal, mislead, produce products that spew toxic waste, and ever murder (war).