A guy who spends 12 hours a day, 365 days a year, digging a hole and filling it does a lot of work, without producing any wealth. Work is a requirement for pro

A guy who spends 12 hours a day, 365 days a year, digging a hole and filling it does a lot of work, without producing any wealth. Work is a requirement for producing wealth, but is not a sole and sufficient requirement. Useful work is. There are, however, plenty of ways to produce money without doing any useful work.