Which country is the United States' No. 1 intelligence service partner?

Hints:

1) Not a five eyes country

2) Taxes are extremely high

3) Elon has recently commented on the extremely high level of gaslighting in this country's MSM

4) Its people celebrate the country's constitution day harder than any other

5) Together with its neighbors, this country's ministers (in the govt) have the lowest level of education in the world