Breaking up big tech companies is undoubtedly good for the workers, create more competition in hiring. It would probably send money downwards and be a huge boon to innovation tbh.
The major damage big tech is doing is in my opinion dodging regulations or inventing business streams that have no regulation, moving as fast as possible to get a solid footing, and then asking the government to regulate them. Therefore, they lock the smaller guys out. Therefore, there’s little to no competition.
Is Apple trying 100 things out or are they hoarding insane amounts of cash in Ireland?
This field has a ton of natural incentives to scale as big as possible. I feel like the main beneficiaries of breaking up big tech companies are business people and lawyers getting to insert themselves everywhere to interface between groups that used to be the same company.
Also, if you need the best database developer, they might find their own lucrative vertical and/or disruptive passion project. It makes great sense to counter the potentially hypertensive corporate rigamarole with a fat paycheck. Similarly, if it would have convinced Elon Musk to forget about this EV thing and take a well funded engineering department at Daimler, well that might've felt like winning the hiring lottery.
Imagine that there is a psychological line that most bosses want to reach, for example "to become a millionaire". This desire is the same whether you live in a richer or poorer country, and whether you have twenty or two thousand employees. The word "millionaire" is simply a magical word which does not automatically adjust to e.g. "3.2-million-aire" just because you have more employees or live in a different country. Also, "millionaire" these days in Eastern Europe refers to million euro, just like in Western Europe, and not much different from million dollars in USA, i.e. it is country-independent.
Now if we assume that the million is a fixed psychological goal, this is easier to reach in a large company than in a small one. If you have two thousand employees, you need to make 500 euro per employee. If you are okay with becoming a millionaire in five years, that's 100 euro per employee per year, which is barely noticable. But if you have twenty employees, during five years it makes 10 000 euro per employee per year. They are going to feel that. (Also, the higher the costs and average salaries in a country, the less the employees will feel those 100 or 10 000 euro per year.)
According to this model, employees in small companies in Eastern Europe should be paid very little. But their bosses should still become rich.
Many of the largest tech companies are only large because of their cost centers. If we split up google what would likely happen is that youtube and gmail would simply die.
Or compete on a level playing field with Vimeo, Fastmail and so on. Everyone wins if Google is split up. Even Google shareholders, who will finally get some nice dividends when the ad business money isn't being diverted to prop up the rest of it.