That's what the U.S. is planning to do. International trade is fun. While the Saudis are buying bombs from the U.S., a Saudi prince is buying bits of the Citigroup Inc.. And of course the Saudis sell oil. Everybody ends up very pleased, except perhaps the final consumers of those bombs.
I can't help thinking of that old saying that a capitalist would sell you the rope you are going to hang him with.