A warning from Walmart about the health of the American consumer

“Choiceful, discerning, thoughtful.” That is how Walmart’s boss, Doug McMillon, described consumers on the American retail giant’s quarterly earnings call on February 21st. That may be so. What they are not, at least in aggregate, is careful, thrifty or frugal. Last year consumer spending increased even as real disposable income declined by more than 6%. The splurge continued in January, as America shopped its way through a warm…