Me, personally, I would pick the "more parental leave and lower salaries", but I get that other people might feel differently.
(Edit: This cuts the other way around, too, by the way. Often people in Germany will complain that people across the border in Switzerland -- or in Silicon Valley -- will earn much more, but they ignore that working days are longer, with less vacation time, less parental leave etc.)
U.S. GDP per capita [1] (2018): $65,060 Germany GDP per capita [1] (2018): $49,690
The U.S. earns 22% more per capita than Germany.
Imagine if the U.S. implemented policies such that our economy slowed to Germany's per capita rate. At our current GDP of $20.66 trillion, it would wipe over $4 trillion from our GDP. Seeing as the U.S. is the biggest marketplace in the world (in terms of dollars), it would have trickle down effects that would dramatically depress the world economy.
[1]: https://www.imf.org/external/datamapper/NGDPDPC@WEO/USA/DEU/...
I’d support it even if the causation is only the other way - i.e. it’s a reform people in rich productive countries choose to spend on.
Example: poor countries can't afford the level of worker safety that rich countries can. So do you not trade with them? They then stay poor and work as subsistence farmers, something a lot worse than working in a sweatshop.