How does Hutchinson's charge of Puritans living by a "covenant of works" support Elson's larger argument regarding Puritan law?

Hutchinson was an advocate of the puritan ethic of hard work as delivering an expanded chance at everlasting salvation in the afterlife. It was this principle that was like the more extensive puritan law, as it concentrated vigorously on the significance of hard working ethics as acquiring positive advantages in religious perspectives.