"How can we justify Big Tech being worth trillions collectively without allowing them to treat their workers as interchangeable widgets at the lowest cost possible."
Which sounds better to an electorate? What are the odds your average citizen is ever going to be an ultra high net worth individual or work at a FAANG? I believe the odds are in regulatory favor.
Google has the resources (with gross profit ~$100 billion for 2020), they simply choose to evade labor law in this case.