These companies are so huge and such an integral part of society that they need to be made more accountable to the public, and forcing them to be more accountable to their workers is part of that. I think the recent proposal to require employee representation on the board of directors of $1B+ companies is a good start.
On Day One, the entire workforce of every company becomes "contractors". Labor does not have the leverage in most industries as it does in large tech. Even in tech it is cyclical. Younger readers here, who missed out on the 2001 and 2008 crashes, are going to have an eye-opening experience when the next recession gets here.
The concept of a salaried workforce is embedded in our society at a fairly deep level, and upending that to prevent workforce representation might not be that easy.