Wells Fargo will pay billion in fines imposed last week by regulators over accusations of overcharging hundreds of thousands of customers, making it the largest such penalty handed down by government agencies. Eye-popping as the amount seems, experts say it is not necessarily a sufficient deterrent to future malpractices. The Consumer Financial Protection Bureau (CFPB), in coordination with the Office of the Comptroller of the Currency (OCC), announced the fines, and ordered the bank to compensate shortchanged customers and adopt changes in internal practices. Pointing to repeated violations at Wells Fargo and other large banks, they said what could alter the stakes are changes in corporate culture, the prospect of criminal liabilities on banks and their executives, a regulatory push to get admissions of guilt from banks rather than settlements, and a facilitating policy environment.…