source of income

This humble mollusk is a vital source of income and nutrition for many coastal residents.

Moore added that Trump’s pledge to not tax Social Security benefits “is unlikely to affect older Americans who depend on Social Security as their only source of income or beneficiaries getting the average amount from Social Security or less or Americans who are in the bottom half of the distribution in terms of their lifetime earnings,” adding that these groups often “overlap substantially.”

Universities had been calling for fees, their main source of income, to rise to help ease pressure on their budgets amid ongoing financial challenges.

She told the BBC's Sunday with Laura Kuenssberg that "working people" were those whose main source of income came from "going out to work".

So the real value of fees, which are the main source of income for universities in England, has fallen with inflation.