I don't see the ethical problem as all that dramatic, other things being equal (i.e. the side effects of the antagonists are negligible).

Traders who don't want to waive the rush would be free to go into useful work. And individuals who are currently working as traders could be offered backoffice jobs.

I'm not advocating compulsion. But there is a public interest in preventing financial traders from hotdogging.

Besides, Nalmafene would presumably constitute an effective coke rehab therapy in its own right.

The fact is that what we're experiencing right now is a top-down disaster. -Paul Krugman