Sorry if I'm out of the loop, but which proposal are you referring to, and who proposed it?
> Empowers workers at United States corporations to elect at least 40% of Board members: Borrowing from the successful approach in Germany and other developed economies, a United States corporation must ensure that no fewer than 40% of its directors are selected by the corporation's employees.
- https://www.warren.senate.gov/newsroom/press-releases/warren...
no one is forced to work at these companies and no one is forced to buy the stocks. if you don't like the way the company is run don't work there or invest.
imagine the opposite heavy-handed intervention. what if it was proposed that companies are banned from allowing employees reps on the board...
This is not a strong argument.