There are so many loving things the government has kept secret or killed people over because they don't want change, or innovation, they just want to keep everyone fat and happy with a splash of capitalism. We could've had cars that ran on water, we could've had the means for more efficient energy consumption. There are tons of inventions and oddities, that we could've had, but the inventors either "died" of unknown reason or suddenly vanished.
There's a video out there on the web, a documentary of some sorts, that explains how the 4 major banking companies are also the 4 major gas companies and so forth, and how they pay to get by with stuff that the government would say "no" to. Stuff like bribing news companies about false articles and funding "black projects", which cost millions mind you.