Companies have found that it is much more rewarding to keep workers working 40 hours (in Europe) or more (many parts of the world, including the US) or more, and to translate the productivity gains into bonuses for top management, dividends for shareholders and increased share prices (for shareholders and top management) [1].
Without the necessary regulation, this process will not be significantly altered either, in my opinion. I firmly believe that hardly any (large) company will be prepared to significantly improve conditions for employees without external pressure - at the expense of shareholder value.
For example, it is perfectly normal for a company like Accenture to pay a 10% higher dividend for the past fiscal year, while dismissing 5% of its employees worldwide. We don't even have to dream of wage increases for employees in the 10% range here. And ACN is just one example because I happen to know the numbers right now.
What company increases its employees' wages by the same amount as it increases the dividend for shareholders? I hardly know of any company that does that.
[1]: https://duckduckgo.com/?q=development+productivity+wages+us&...