Both Beale and Ashley-Cooper were involved in the 27-7 win over Italy a week later, with Cheika only learning of the breach nine days after the incident.
However, Australia has a rule that no guests are allowed in hotel rooms, and team leaders including captain Michael Hooper, Pocock, Nick Phipps, Samu Kerevi and Allan Alaalatoa decided a breach occurred.
It is believed one of the women who visited the team hotel in Cardiff was Ashley-Cooper's sister-in-law, but Cheika insisted the pair's punishment was essential to build a winning culture.
Beale and Ashley-Cooper have 83 and 117 caps respectively and Hooper said approaching Cheika about the situation was one of the most hard moments of his captaincy.
"I think from 1-23 they're all out of form", Paul continued.
"The leadership group came to me earlier in the week and asked me to deal with it in a way I thought was appropriate and I thought this was the appropriate way", he added.
Even former Wallabies coach Bob Dwyer, a close ally of Cheika's, said it was time for him to draw a line in the sand.
"We've got to make this team better and stop making the small excuses, 'I didn't understand that that would be, I thought that would be okay, '".
"There's a lot of great people in our team and great stuff going on behind the scenes and we will turn the pain into wins next year".
IT was put to Michael Cheika after the Wallabies' record sixth successive defeat to England, ending their worst year, that he must be glad 2018 is finished.
"One thing we've had this year is we've been really solid, in the face of a lot of adversity".
Rugby Australia has backed Cheika until his contract expires at the end of the 2019 World Cup in Japan.
"They were very apologetic. We've got big goals as a team". "They realised their error and they have been trying to help the other players get ready for tomorrow's game", he said.
Coach Michael Cheika confirmed the sanction on Friday, at the same time as announcing No. 8 David Pocock was withdrawn from Saturday's test at Twickenham after failing a fitness test on his sore neck.
Some reporters have led the calls for Cheika to lose his job, and news he has lost control of two senior players is likely to alert the Australian Rugby Union.
Cheika has made five changes to the side that beat Italy, with Kurtley Beale axed and rookie Jack Maddocks preferred on the left wing to Marika Koroibete who scored twice in Padova.