President-elect Donald Trump has proposed expanding health savings accounts as an alternative to the health law. More than 20 million people now have high-deductible health plans that can link to the tax-advantaged accounts, and the average account balance grew by more than a third last year to more than $1,800, according to a new analysis. But consumer advocates warn that health savings accounts would do little to help lower income people who would lose their health insurance if the health law is repealed.