Set UK/EU tech salaries at maybe 30%-50% of US, and factor in higher taxes. Then integrate over 40 years, resulting in a number from which investments can be drawn. Add to the corresponding US number all the profitable exits from previous ventures. There's just so much more US investment capital available.
It can be argued that a responsibility falls on EU equity companies, pension funds, and so on, but they do not make seed investments.
It can be argued that a responsibility falls on EU equity companies, pension funds, and so on, but they do not make seed investments.