This bears repeating. You need to find both a law firm willing to take the case and a litigation funder if you want to avoid upfront fees. Litigation funders are understandably choosy about what cases they fund and they're not going to fund an action against someone who has no capacity to pay or who is likely to become insolvent before the litigation process is completed (class actions typically take years), either voluntarily or due to claims by creditors outside the class action (in this particular instance, I'd be concerned about the possibility of fines by ASIC if financial services regulations were breached and any debts which might be due to the ATO).