If I hadn't seen corporate lawyers representing multi-billion dollar investment firms regularly advocating my City Council with just this piece of rhetoric almost verbatim, sure.

But it's been ten years since I've been involved with local community organizing and I know a dogwhistle when I see one. Whether or not the original poster intended it to be a dogwhistle or just formed that opinion memetically after uncritically absorbing astroturfed 'drain the swamp' rhetoric, it all leads to the same place where private equity and other investors get to run rampant with little regulatory oversight.

That's a false dichotomy. One possible solution to the problem being bad doesn't mean that the status quo is actually good or that there aren't workable possibilities that are reasonable.

A broken clock is right twice a day and all that. Regardless of who you witnessed parroting the rhetoric and to what end that doesn't necessarily mean the rhetoric is wrong in and if itself. In this case I'd say it's quite obviously correct.