Most suspect it's because Costco has higher-end merchandise, which attracts a higher-end clientele. But that's not why.
The main reason is because when I walk into a Costco store the people working there are happy. Good wages translate into happy employees, and happy employees make for happy customers. You don't have to pay Google wages to make this happen, but you do have to pay significantly more than the minimum wage, and Costco does that.
The Glassdoor survey of Costco wages show a pretty flat salary curve, with pay ranging from $10-$23 an hour for cashiers and just $22-24 an hour for supervisors. No position averages much more than $22 an hour, but none averages less than $11 an hour either. Even the guy who checks your receipt and the woman who sells the cheap hot dogs take home a decent wage.
Glassdoor estimates salaries at Sam's Club are quite different. Cashiers and other low-level employees make as little as $8 an hour, but supervisors take home an average of almost $50,000 a year, which comes to about $25 an hour.Follow @danablankenhorn This article represents the opinion of a contributor and not necessarily that of TheStreet or its editorial staff. Follow TheStreet on Twitter and become a fan on Facebook. >>Read More: The Seven Deadly Sins of Biotech Investing >>Read More: Palo Alto Networks Is Too Good to Be Left Alone