We socialize kids to be materialistic. If you care about wealth and luxury, your kids will care about wealth and luxury.
The more TV kids watch, the more likely they are to be materialistic.
Materialistic tweeners and teenagers are more anxious and less happy and have poorer self-esteem.
When we are feeling unfulfilled in some way, we'll often seek to quell that need through shopping. Materialism is a terrible coping strategy.
Are you actually encouraging your kids to care more about things than other people and experiences?