I suppose among the policies that would reinforce such messaging would be a) busting up the biggest banks via some combo of size caps, restructuring, vastly higher equity levels, b) a transaction tax-corporate tax cut swap to deal with high-frequency trading, c) curtailing the tax inducement for excessive financial leverage by scaling back the interest expense deduction.
Make no mistake, this would be a radical departure from the standard GOP financial reform menu. No idea if Rubio has an interest or not. But the Politico piece reminds that pay-to-play rules would hamper Chris Christie and Bobby Jindal in raising Wall Street cash should they run. Perhaps they could turn that liability into an opportunity for some policy creativity.