Senator Jeff Bingaman, a New Mexico democrat, introduced the Automatic IRA Act of 2010 last week. The new legislation would require all firms with 10 or more employees that don't already offer a retirement plan to automatically enroll workers in an IRA. Workers who don't wish to participate would need to take action to opt out or change the default contribution amount and investments. Here's a look at how this bill, if passed, would affect you: Standardized 3 percent savings rate. Employees age 18 and older who have been employed for at least three months would be automatically enrolled in...