The NIH (national institutes of Health) spends $3 billion a year on AIDS research. Alzheimers, which effects 5 times more people, has a budget of just $500 million.
The United States spends $95 billion a year on Medical research. A massive amount of money but it pales in comparison to their annual security defense spending, which is a staggering $640 billion. That $640 billion is more than the next 8 countries combined (China, Russia, Uk, Japan, France, Germany, Saudi Arabia and India.
You could say, well okay, if they have found cures for certain diseases then why are the U.S still spending $95 billion a year on research. A smoke screen perhaps, who knows ? I'm just throwing it out there.
I don't think it has anything to do with a cover-up. I think you underestimate how dumb governments are and how slow and meandering the process of democratic government is. The USA's military spending is down to a powerful military lobby in a nation that gets itself into enough wars and is hated by enough belligerent countries to justify it. That's a different argument, really. Healthcare in America is mostly a private enterprise, dictated by private pharmaceutical and insurance companies who, I imagine, fund their own operations. Also a different argument that has been well travelled in this forum. The military is a publically funded entity which, by its nature, needs a share of the national budget to exist. The two just aren't really related.
I'm sure there's lots of shadowy dealings in all tiers of government and private corporations, but they're usually individual cases of backhanders, insider trading, blackmail, overpowered lobbies, morons, cover-ups and all that other bad stuff. The sort of co-ordinated government population control program you're implying would require the sort of extraordinary level of compliance and cooperation at all levels of the operation that governments are completely incapable of. In fact, the only evidence that the ebola virus is weaponized population control unleashed by the American government is what a terrible form of weaponized population control it would be, the kind that a bloated, bureaucratic mess would put together in a few days.