A reader recently reminded us that the Puritans had two kinds of "callings", the "general calling" to God and a secondary calling to labor.
Thus work was not seen as being about ethics, but as somewhat - or very much - sanctified. All honest work, after all, is a form of service.
The pop view of our Puritan ancestors is distorted, and a bit of a straw man. Grace Baptist has a good post on Puritans and work. He refers to what looks like an interesting book: Worldly Saints: The Puritans as They Really Were.