The 529 ABLE plans in the U.S., launched a year ago, are useful for people with disabilities because they provide a tax-free way for themselves, their families or friends to save money for qualified expenses such as education or transportation. They also help protect people with disabilities from losing social security benefits when they cross income thresholds. However, policy makers need to redefine disability and revisit restrictions that existing laws place on people with disabilities from taking employment and becoming independent, experts from Wharton and the University of Texas said. The 529 ABLE plan is “an important statement and a great opportunity for people with disabilities,” said Lex Frieden , professor of biomedical informatics and physical medicine and rehabilitation at the University of Texas.…