I listened an interesting interview on the 'Protestant work ethic' and its lesser known, progressive alternative on The Gray Area with Sean Illing. The interviewee was Elizabeth Anderson, a professor of philosophy at the University of Michigan.
She recently published a book "Hijacked: How Neoliberalism Turned the Work Ethic against Workers and How Workers Can Take It Back" about how the unrelenting accumulation of more has led to the exploitation of working people. Whether you agree with the premise or not, it is a conversation worth listening to.
There is also a profile about her in the New Yorker.