> $130k in the US [...] vs. $50k
Just no, a $130k salary in the US would be at least 70k€ in Paris. In others city it would probably be less but the cost of living would be much less too.
> there's even talk of actually forcing men to take paternity leave
Just because one organization (OFCE) ask for it 3 days ago doesn't make it a reality.
> even something as simple as getting business-class internet requires a SIRET number
I pay 30€/month for 1Gbits/250Mbs. If you need more than that, you're already a business and have a SIRET. Same for the phone line. I don't know about incorporation paperwork in the US but I did it alone in France and it was really not that hard. It took me a week max to get everything.
> Paris -- expensive, somewhat dirty, a dreadful public transport system
It's 73€/month, and half is paid by your employer for unlimited access to all transport in Île-de-France. Do you really find this expensive? Paris also provide the "best access to public transport in the world" according to some recent article. http://www.thelocal.fr/20161011/parisians-have-best-access-t... Yes some place are dirty but isn't that the case all over the world?
That said Paris is far from my favorite city in France. And as you said the job market is probably far less liquid than in the US because of the CDI. Even if I personally think that this is a good thing. In software development/operations there is still more jobs than applicant at least in Paris.