If you genuinely believe there aren't any banksters giving financial support to the leave campaign, you're as gullible and easily manipulated as you sound.
Some individual bankers have definitely given money to Leave from their after-tax earnings. But the sums are absolutely dwarfed by the money that corporations like Goldman Sachs and JP Morgan have given to Remain.
You are deluded if you think big money doesn't want remain - you only have to see the way the markets soared when that MP got murdered to understand how badly they want a Remain vote.
Some big money wants to remain, other big money wants to leave. It's not a middle finger to the elites to vote leave, that's just what they want you to think:
Full article here.
Also, Boris Johnson was on record a couple of years ago saying he wanted Britain in the EU. Clearly money talks if he's now all of a sudden campaigning to leave.