In the new film The Joneses, Steve (David Duchovny) and Kate Jones (Demi Moore), along with their two teenage children, move into an upscale community with the best goods, clothing and cars that anyone in the neighborhood has ever seen. The thing is, they’re not actually a family. They are employees of a stealth marketing organization who are in competition with each other to raise their sales while making everyone else want what they’ve got.

During a press conference to promote The Joneses, co-stars David Duchovny and Demi Moore talked about consumerism and how you have to keep a perspective...