Its evident that labor cost and taxes are not excessive in EU by the reality of existence of plenty of businesses in a healthy society.
What doesn't exist in EU is the "tech" business, and the tech doesn't have margins too slim to employ people and pay taxes. On the contrary, the margins are fat. The reason that the tech sector isn't a large one in EU is that its easy to incorporate in USA and access the full EU market from there instead of incorporating in some small EU country and deal with their bureaucracy and internal border limitations. The 28th regime and the EU-INC is to address exactly that.
If the USA-EU relations deteriorate enough, it will also create instant trillion Euros market. Just look at the quarterly reports of US tech giants, they generate EU revenues that are not that behind the US revenues. For Apple thats %60 of the US revenue, or ~110B$ for the last quarter and that's happening despite Apple having a much smaller market share in EU.
A full blown conflict between US-EU will be a huge opportunity to replicate the US tech sector in EU and having an EU-INC will be the necessary facilitator that is currently missing when compared with the landscape in USA.