There's only two options in my mind.
1. The governments of the world work together with aliens to bring about secret technologies, and maybe towards their eventual revelation.
Which could be good or bad, depending on how rotten the governments of the world are. After all, keeping this such a secret has cost trillions of
dollars. At some point, the world will go bankrupt (if it hasn't already) trying to keep it in the manner in which it has been kept. Catherine
Austin Fitts, who was part of George H.W. Bush's administration has said as much.
2. The governments of the world do not work with extraterrestrials and they are indeed hostile. They only recieve their technology from crashed space
craft and attempt to stave off the inevitable attack that will leave no doubt as to their existence. I do not feel this is the case.
I don't know what is and isn't alien in origin that is given to the public for use, but I think some is.