Walmart’s decision last week to raise its workers’ salaries could be read as either a smart move or inadequate, depending on the company’s larger goals. The company said that beginning in April, it would pay entry-level workers at the company an hour, going up to next February, while it would start salaries for department managers at this summer, and increase that to next year. The move will cost the company billion and benefit half a million U.S. workers, or about two-fifths of its workforce. Walmart CEO Doug McMillon said in a letter to store employees announcing the wage increase, “When we take a step back, it’s clear to me that one of our highest priorities must be to invest more in our people this year.” More Is Merrier “If your goal is really to build employee morale, then maybe you handle it differently,” said Wharton management professor Adam Cobb . “If you really want to make a big impact, then the dollar amount should have been more,” he noted.…