While I'm sure it can be minimized, the US doesn't have a particularly low corporate income tax rate.
> And if they paid that tax in the US [...] how would that help Spain and France?
Companies like Google not having to pay tax on revenues outside the US is essentially a government subsidy. One that creates a "slush fund" for US companies to acquire their European competition. We're essentially in a trade war, just that Europe hasn't realized it.
Except that "US companies" incorporated in Ireland aren't US companies. Can't European companies also incorporate in Ireland?
A company whose primary employees are in Europe and whose primary customers are in Europe can still be incorporated in Delaware and traded on the NYSE. These tax avoidance mechanisms aren't for "US companies," they only work if you're in practice an international company. A "European company" which is also in practice an international company could do the same by becoming nominally a "US company" without changing anything of consequence about their operations. Because international companies don't really care where they're incorporated.
The trade war isn't between US companies and European companies, it's between companies big enough to be "international" and everybody else.
This is utter nonsense. The problem is US tax repatriation laws introduced during the Clinton administration that allow US companies to leave their profits offshore in countries such as Bermuda or the Cayman Islands. Since they are only taxable on repatriation to the US, they pay no tax on them. Instead, they pressure Congress to introduce 'one-off' tax amnesties that allow them to repatriate at a much lower rate. This problem could be solved tomorrow if US politicians rescinded those tax laws. Ireland has no legal right to tax those profits, since they are earned by parent US company e.g. Google US. Which is perfectly correct, since the foundation of most of those profits are the intellectual property created primarily by the parent company. Don't let US politicians pull the wool over your eyes that this is a problem over which they have no control. In case you're interested, here's a good article that gives more background: http://www.rollingstone.com/politics/news/the-biggest-tax-sc...