In a sign that House Republicans are willing to go only so far to mollify concerns about inequality, they plan to move ahead with a proposal to eliminate the estate tax, though it would be phased out over a number of years. They also will propose changes to tax-protected retirement savings plans, such as 401(k)s, in an effort to raise revenue. But Brady said Tuesday those changes remained in flux and that 401(k)s might ultimately be left alone.