Consider that government, especially here in the USA, used to be just a bunch of us guys getting paid to organize things for the general welfare of the society. Doing the necessary stuff. Water & hygiene, trash, defense, things like that.
Along with the introduction of a central bank currency, so no longer, money is common to all of us, but now is exclusively created by a single entity, the Federal Reserve, we get this shift of the conception of government from a common effort to get the dirty jobs done over to the idea of Government as Authority.
The Federal Reserve was the gatekeeper, the authority, on money, and the Government, became the authority on everything else.
This means there will be NO DISCLOSURE of UFOs.
Government can't maintain the illusion of being Authority when they can't answer so many of the questions raised by the existence of UFOs.
It wouldn't work for Government to present a bunch of information proving UFOs exist only to then say "we don't have a fucking clue about what they are, or what they are doing".
So, no Disclosure. Government can be relied upon to always choose the option that preserves their power.