I must admit, at first blush when I read this I was opposed to Obama's proposal on it. But if you look behind the theory and get into the hard numbers, it is true that the program has disproportionately helped the wealthy avoid taxes the most.
Why Obama Wants to Tax College Savings - TIME
This point particularly caught my eye:
"And, in part because high earners typically owe higher taxes, the wealthy reaped large tax breaks from using 529s. In 2012, the GAO found that Americans who made less than $100,000 withdrew a median $7,491 from their 529s, saving just $561 on their taxes. But Americans who earned more than $150,000 withdrew a median $18,039, saving $3,132 in taxes."
I hope there is a compromise here and that the tax break can be maintained on a progressive basis, i.e. the lower your income, the greater the amount of tax break you can retain over time.