Retirement Savings for Working Americans Act - Amends Internal Revenue Code provisions relating to the tax credit for retirement savings contributions (saver's credit) to: (1) require the Secretary of the Treasury to deposit saver's credit amounts directly into the designated retirement account of the taxpayer; (2) expand income eligibility levels for the saver's credit; (3) allow taxpayers that contribute to a qualified tuition program or a Coverdell education savings account to claim such contributions as retirement savings contributions; and (4) adjust the saver's credit maximum contribution amount for inflation beginning after 2007.