A number of things wrong with your "theory" here:
-Mosley was in charge of the FIA in 1993. He was particularly fond of Ayrton.
-'No bone in his body was broken' APART from the massive compression fracture in his skull, which left him brain-dead.
-The black box didn't go missing. Williams retrieved it straight away, with the permission of the FIA, before the Italian authorities seized the car.
-'No telemetry present' 100% wrong. Patrick Head has referred to the telemetry on numerous occasions.
-'Car went straight on' wrong. The car bottomed out severely, causing oversteer. The TELEMTRY showed that Senna reduced throttle by 50% and went to full opposite lock, before applying brakes several seconds before impact. It's at the point of opposite lock that the steering column is believed to have failed.
Not much of a conspiracy theory left in my opinion...