Big tech owns a big chunk of the job market. So, the job market is not a market but a centralized system were big-tech has all the power to shape it.
Unionizing is just part of the fighting back. Only splitting the big monopolies can bring back competition and healthy salaries and promotions.
Monopolies are bad for consumers, but they are also bad for employees when that monopolies control most of the jobs of the industry.
> Big tech owns a big chunk of the job market
Big tech employs less than 1% of the people in the country.