Consider that the OP is about Abacus, a financial product created by Goldman Sachs at the request of a speculator. If more exotic products like that are tainted

Consider that the OP is about Abacus, a financial product created by Goldman Sachs at the request of a speculator. If more exotic products like that are tainted by evidence of systemic corruption and the possibility of having to spend time in court, then customers may well choose to park their money in boring stock or bond index funds, which give the banks a much smaller cut. So it's not a zero sum game.