Sexual exploitation is “endemic” in the aid sector, and the Oxfam scandal is just “tip of the iceberg”, MPs have found.

MPs on the International Development select committee warned in a 120-page report that voluntary organisations failed to tackle the problem because they were more concerned for their reputations than for the victims’ interests.

The cases which have been made public are “only the tip of the iceberg”, because of “confirmed under-reporting” by charity workers.

The MPs warned that “individuals known to be predatory and potentially dangerous” were able to move around the aid sector “undetected”.

Charities have been left reeling after it emerged that Oxfam workers who had been sent to help victims of a major earthquake in Haiti in 2011 had paid prostitutes for sex.