Maybe more than one such idiom? I probably skipped some commas. Also, I'm a bit of a nut, so most people will disagree with at least part of that sentence. Piece by piece:

"somewhere, someone is losing money": Any functioning market in securities will have winners and losers, so it isn't automatically a problem that someone has lost in any particular situation.

"concern trolling": This is when e.g. I pretend that I'm worried about something bad that might happen to you, but in reality the advice I'm giving is meant to help myself instead. We see this typically when a consultant from one political party claims to be worried about consequences for the other political party.

"fallacy": Something lots of people believe, that isn't true.

"usefully idiotic": A "useful idiot" is someone who believes the bullshit peddled by class enemies to such an extent that she'll repeat that bullshit in all seriousness, to her own detriment.

"bailout follies": We've had lots of economic downturns, but somehow only those overseen by Goldman alumni as Treasury Secretaries have required the taxpayer to give Wall Street lots of money.