I don't know about that. What does it mean anyway, who are 'the saudis' and what are these 'big contributions"'? Can you back this statement up? It seems like your suggesting there is another conspiracy going on with the saudis.
The saudis have a very uneasy relationship with the US. They have to face lots of pressure form there own people wanting nothing to do with the americans whilst there on Saudi soil and yet keep the americans happy for other reasons. They can't just choose the price of oil they want and say there you go. It doesn't work like that.