Also, the fact that most governments tend to hack at the pre-encryption level and use social engineering to hack devices on encrypted networks kind of confirms they do not have the capability to break encryption.
Likewise with the CIA. From the 1% of the documents leaked so far, there's no evidence that they have the ability to crack modern encryption. But the documents leaked seem to come from a contractor (or were shared with a contractor) so there are likely internal-use-only tools with greater capability than shown in this leak.
That's not to say that they definitely have ways to break modern crypto, just that we can't prove that they don't given the material publicly known so far.
Anyway, these are extraordinarily difficult problems which may not have good solutions outside of quantum computing. You can throw all the smart people and computing power in the world at a problem and still come up with almost nothing.