(Reuters) -U.S. bank regulators’ proposed new capital requirements for large banks, if finalized, would violate key federal laws and needlessly impose burdensome costs on 80% of assets in the country’s banking system, major industry lobby groups said on Friday. As a result, the proposal issued in July by the U.S. Federal Reserve and two other agencies should be entirely scrapped and re-issued, according to a comment letter from the Bank Policy Institute and Financial Services Forum, trade groups representing giants like JPMorgan Chase & Co and Bank of America. Two others, the Securities Indust…