Back during the Nixon years, my Ph.D. dissertation chairman, Warren Nutter, was Assistant Secretary of Defense for International Security Affairs. One day in his Pentagon office I asked him how the US government got foreign governments to do what the US wanted. "Money," he replied.
"You mean foreign aid?" I asked.
"No," he replied, "we just buy the leaders with money."
It wasn't a policy he had implemented. He inherited it and, although the policy rankled with him, he could do nothing about it. Nutter believed in persuasion and that if you could not persuade people, you did not have a policy.
Nutter did not mean merely third world potentates were bought. He meant the leaders of England, France, Germany, Italy, all the allies everywhere were bought and paid for.
They were allies because they were paid. Consider Tony Blair. Blair's own head of British intelligence told him that the Americans were fabricating the evidence to justify their already planned attack on Iraq. This was fine with Blair, and you can see why with his multi- million dollar payoff once he was out of office.