[s3000]

Amazon doesn't make profits and thus doesn't pay taxes. Bezos doesn't sell much and thus doesn't pay taxes either. Changing rates wouldn't change anything. Tax rates only affect the middle class, and as @jliptzin has pointed out, those tax rates are quite similar.

The EU has a lower output because there are fewer investors. One successful startup creates wealth in the hand of knowledgeable people who can create the next startup. There are simply not thousands of millionaires and billionaires who can successfully pick the next round. There is also less of a network effect where venture capitalists can offer their portfolio as leads for the sales teams of their new investments.

The Nordic welfare levels can turn out to be the path to European success. It's easier to start an idea when failure doesn't end in an existential crisis.