Massive turnover, which is what events like this create, works directly against the goal of securing more headcount: it means they're spending a big chunk of their recruiting energy just retaining the headcount numbers they already have.
Headcount is one of many metrics that can constitute success and eventual promotion. I posit that giving flashy results to customers is the #1 best way for a particular executive to make a name for herself and advance. FBI is a great example of this, constantly attempting to make splashy headlines; it presses its advantage of being able to go to the press.
I've only seen headcount increase in response to what WH, ODNI, and Congressional intelligence committees view as crises. Headcount shuffles away for objectives that aren't considered sexy, e.g. Russian linguists and analysts in the late 1990s-2000s.
To me and for the kind of work I do, this has important implications: it means that you shouldn't do things to make it harder for NSA to do their job (that's just feeding them, just like feeding in DOTA or LOL) --- you have to make things intractable for them.
Intelligence agencies are lead by people. Those people have motivations that inform their decision-making. Prestige, power, increased income, and (often, but not always) patriotism are, in my opinion, their primary motivators. This should for the most part be similar for any corporate executive.
Unless there are hard metrics tying headcount to performance reviews and promotion considerations, and simultaneously soft-power incentives for having more headcount, then other things will dominate. In the military, splashy achievements dominate. Or at the minimum, making your boss and your boss's boss like you is essential.
The current NSA chief didn't get his job because he was in charge of the largest Fleet. He got it by networking, seniority, luck, and having a reputation for excellence (I do not know if it is deserved). The same can be said about civilian executives in the IC, who are rated in a more arduous, more holistic manner.
Your bottom line is correct in the specific case. If a Latacora client is targeted by the NSA with high priority, you cannot protect it unless you make it intractable for them. For the rest of us, using boring commodity mitigations, such as TLS and MFA, and sound network architecture are fine. Intractable-for-all is a noble effort, but I don't think it's realistic.