I'm 100% sure that it stands for Three-Letter-Acronym. The joke is that it's an inscrutable business acronym to make fun of inscrutable business acronyms.
I actually used to do this during orientation sessions at my old job. I'd tell the new hires that if they were ever confused by terminology or acronyms, they should never be afraid to ask, because if people are using jargon or TLAs that they don't follow, they will miss the context.
Then I'd pause. If anyone asked what a TLA was, I'd give them a candy bar.
There have been a few notable school districts in my state that got duped by these people over the last 10 years or so, and the pattern is pretty much the same:
It's a huge waste of time and money, and in the end everyone hates these fucks even more than they did to start with, and people are even more interested in voting in local elections. I'm not sure it's a winning long-term strategy for the fascists. You could argue it works to get more progressives and moderates to the voting booth in the long run.