Admiral Rickover's solution for the U.S. Navy submarine program was to write into the contract having company executives on the boat for its first dive.
All that means is that you buy stuff from people who cannot properly assess risk and everyone dies from stupid, predictable, known issues, like with OceanGate.
What ACTUALLY fixed the submarine program was SUBSAFE, a quality assurance program that mostly generates paperwork and instructs you to check things over and over.
My understanding was that SUBSAFE was put in place first, but executives insisted on just pencil-whipping the requirements --- until the requirement that they went down on the first dive was put in place --- at that point things were taken a bit more seriously.
What ACTUALLY fixed the submarine program was SUBSAFE, a quality assurance program that mostly generates paperwork and instructs you to check things over and over.