Whistleblowers must be given proper support so they have the courage to come forward, the chair of the Commons Public Accounts Committee has said.
Margaret Hodge revealed six out of 10 people would not speak out over fears of reprisals from bullying colleagues.
She told ITV News there must be tougher government sanctions against this so it does not have a detrimental effect on uncovering scandals in the future.
More top news
Slippy start tomorrow with frost & ice
The court will determine how much the UK government and travel firms knew about the risk of an attack on tourists holidaying in the area.
Car insurance for young people could rise by £1,000 a year after a change to compensation payouts for those with life-threatening injuries.