I am not sure what to think about those mega corps, my idea is that they exist, but their relationship with their workers is subject to the oversight of governments regulations and the relationship they have with the forming unions, etc.
I think their workers have a month of paid time off? The ability to have sick days without receiving them from coworkers? The ability to access socialised health care when they need it without going bankrupt? Paternity and maternity leave which might be nice or not depending on the union country in this case, for Siemens and VW in Germany I guess they have a lot of time off, as Italian I believe Italy doesn't have a good law on paternity leave, but that's improving afaik
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I think as a system EU is good for being working class, but to be honest in the past few years I've met some cases where I was not happy, I have lived in Germany for few years and I left because the last company I was working with fired 5 people who were trying to set up a worker's union, and my last boss in Netherlands was too self-centric on the way he built his startup, so on his exit he bought a big villa with swimming pool, a new tesla, but of the marketing guy who grew the company 150% YoY for the last 3 years, backend developers and frontend developers, CS, no one got anything
While a friend's company who exit being sold to a US corp, gave even 3k to people who were interns for less than 6 months, and people working there longer got even bigger perks.
So I think bigger companies are more regulated compared to smaller ones, so I am not worried about them, some smaller ones have owners appear to have a big ego and greed drive, which is something I would like to improve in seeing beforehand