Saudis have been swimming in money and investing heavily for decades. You don't need a conspiracy theory. Ownership is enough to create political power.

The "plant" statement to which you replied is framed like a general conspiracy rumour, and would benefit from references to credible sources, though.

Replace "greatest ally" with "military-industrial complex", do you still need sources?

I’d like evidence or sources for the statement that Saudi Arabia spending money and being wealthy would lead to corrupt officials (plants) in the USA. To me it sounds like an extraordinary claim.