Vaea's conduct was criticised by team captain Mahonri Schwalger and elders in his village of Leauva'a ruled that he must pay a fine of 100 female pigs for sullying his chiefly title of 'tuala'.
Captain Schwalger contributed to a report which accuses Vaea of treating the World Cup as a "massive holiday" and claims that he "spent most of his time drinking".
Schwalger wrote in a report to Prime Minister Tuilaepa Sa'ilele Malielegaoi: "We as a team feel that our preparation was tainted by not having people in vital positions committed to their duties and responsibilities before every game."
Samoa exited the competition at the group stage and Vaea was sacked as manager following the conclusion of their campaign in New Zealand.
In response to Vaea's behaviour, Leauva'a chief Vaifale Iose told the Samoa Observer: "The title of tuala received bad publicity in the media because tuala Mathew failed to perform some of his duties as the manager for the Manu Samoa."
It is reported that Vaea has chosen to pay a fine of 2,000 Samoan tala (£535) and apologise to Leauva'a elders rather than pay the 100 pigs as ordered.