I'm in favor of treating workers better as much as anyone, but I'm dubious about claims that European-style pro-worker policies are actually better for the bottom line. The US has higher productivity than most EU states. Given broadly similar capital and infrastructure, it would seem at least some of this gap is due to people being more afraid to lose their jobs in the US than in the EU.
Not only that, but couching pro-worker policies in terms of benefits for ownership obscures the issue, and implicitly makes the argument that we should only have pro-worker policies when they are also pro-ownership. That's nonsense, since there are millions and millions of workers and we ostensibly have a democracy.