President-elect Donald Trump’s economic advisers and congressional Republicans have begun preliminary discussions about making significant changes to Medicaid, food stamps and other federal safety net programs to offset the enormous cost of extending Trump’s 2017 tax cuts next year.

Among the options under discussion by GOP lawmakers and aides are new work requirements and spending caps for the programs, according to seven people familiar with the talks, many of whom spoke on the condition of anonymity because they were not authorized to speak publicly. Those conversations have included some economic officials on Trump’s transition team, the people said.