Engineering teams are necessarily about collaboration towards a shared goal.

I don't know in what aspects of trading or finance that collaboration is necessary (rather than applied game theory towards each other).

Trading and finance are interesting examples, because those are two places where a lot of money-driven students would go, before tech jobs because easy money (rather than something nerds did for the love of it).

Rather than "Greed is Good" Wall Street thinking take over, we should say "Fine, we admit it, tech pays good money right now, but we do our best work by working as a team, and that's how we're going to do it."

Then we follow through by making the messaging consistent in offers, raises, bonuses, performance evaluations, promotions, project management, metrics, etc.