Are you stating this from specific knowledge of Jane Street?

The division in trading firms, IMLE, is between front office (making and executing trading decisions) and back office (book-keeping, accounting, risk control, compliance, administration, etc). Both sides have technical and financial people. But only front office - both technical and financial - is likely to get wild bonuses from doing good trades. Back office bonuses are more about doing the job well.

If Jane Street is sharing some of the trading profit with back office staff, good on them.