You are reliant on the kindness of strangers to fund your government spending.

It's not kindness, it's interest. Those rates are about to go up up up.

That's true for all governments who issue treasuries. For the US it's the kindness of the Japanese, the Chinese and the British. But mostly their own kindness.

Note that lots of the Treasury holdings are mostly hedge fund related, so it's not as clear who holds the longer-term paper (hopefully someone who knows more than me will jump in at this point and provide data).

And Europe too – around $8 trillion in US treasury bills is held by Europe