For double the pay, I'd work overtime to get something done - if I like it. I used to work 50-60 hour weeks with no overtime pay (yes, yes, I was exploited). Had I been paid overtime and at double the rate, it would've pushed my annual salary to 1.5-2x . But my guess is that either the manager would've been fired for being shit, I would've been fired for costing too much, or they would've simply hired another engineer to join the team (we did need more engineers).