WASHINGTON President Donald Trump says his tax reform plan will help working people, but Republicans are mulling a clampdown on the only part of the tax code that specifically benefits low-income workers.

The earned income tax credit provides a big wage bonus for parents who earn modest incomes, and about 28 million households benefited from the credit in 2015. It was created in 1975 and has been expanded half a dozen times.

But Rep. Kevin Brady (R-Texas), chairman of the House Ways and Means Committee, which oversees taxes, said some households that have received the credit should not have. And his committee wants to make sure they wont in the future.

Were looking at provisions that reduce or eliminate the fraud in that system, which is unfortunately far too prevalent, Brady told HuffPost on Wednesday.

Brady cited the high rate of improper payments on the EITC, which can result if people either deliberately or mistakenly misreported their income. Of the $68 billion claimed in 2015, the IRS has said $15.6 billion of those payments, or about 23 percent, were improper.