Unions outside the US are "society-wide". We have per-company union organizing because of quick hacks applied to the legal system, the same way our healthcare system was created. Sectoral bargaining systems like Europe are less antagonistic and the employer has less motivation to fight against them. It can make the company more efficient since the execs don't only hear what middle management tells them.
There are a whole ton of asterisks on that kind of statement. Most European unions are at most national (which geographically is more equivalent to a specific US State than pan-EU). Many of them are regional, which is even scoped more like a city.
Conditions for a laborer in Bulgaria, Romania, and the UK are on a completely different level. This is not that dissimilar.
