Thats very interesting and I do love a conspiracy theory.
What is most interesting is the fact that Webber's car and Vettel's car seem to behave differently.
Perhaps Vettel has a more advanced version of the car, while Webber is driving the tried & tested version, which is also slower. This wouldn't make sense though, because if Webber is driving an older/tried and tested car, why is it that his car consistently breaks down or runs into problems? An older, tried and tested model is usually more reliable. Right?
Could Webber's problem be heat related: because Vettel drives from the front, he get clean air. Webber always drives in dirty (warmer) air, hence his car is more likely to break. Perhaps the RBR car is temperature sensitive - more so than any other on the grid?