A sizable tax break could be coming for tipped income, but the economic knock-on effects could be damaging.

In a surprising move, the U.S. Senate just passed the “No Tax on Tips Act,” by a vote of 100-0; no senator on either side of the political aisle objected. If the bill becomes law, it could mean that millions of tipped workers get to keep more of what they earn,

Under the bill, employees would be eligible for an annual income tax deduction of $25,000 for some types of cash tips.