I think it's more competition for labor. Why is anyone paid above minimum wage? It's not through charity or "fear" that employees will revolt. It's that there's competition for that labor.
Suppose a worker is worth $20 per hour to a capitalist. How much should they pay? As little as possible, sure, but anything up to $20 per hour is worth it. You'll hire up to that point to maximize profit. Suppose you hand somewhere at $15 per hour, another capitalist will look to lure your employees away by paying them more.
Of course pay isn't the only consideration when working. Workers consider things like paid time off, benefits and how much they like their boss and coworkers. These are all part of the bargain.
It wasn't "society". It was competition. Consider the Ford $5 day, where Ford doubled wages because he realized turnover and poor morale cost him money:
> Ford workers disliked the new assembly line methods so much that by late 1913, labor turnover was 380 percent. The company's announcement to pay five dollars for an eight-hour day compared to the previous rate of $2.34 for a nine-hour day made many workers willing to submit to the relentless discipline of the line in return for such high wages.
https://www.thehenryford.org/collections/explore/sets/detail...