Russell Goodway, the cabinet member for economy on Cardiff Council, told ITV Cymru Wales' Sharp End programme that Wales' largest local authority would also be struggling to balance the books after cuts to funding in the Welsh Government's Draft Budget.
He said: "We employ 10,000 full-time equivalent, excluding teachers. I doubt by the time we get to 2017 that half of those people will be working for the council."
More top news
England enjoyed a winning send-off to their Australia tour as they recovered from early problems leaving Wales floundering.
Veteran singer Sir Tom, 75, is gearing up for his first concerts since wife Linda died after a "fierce" battle with cancer in April.
It will be a dry and fine day across the country with plenty of warm sunshine and light winds.