Sydney coach Paul Roos says he is sick of the tanking debate, but admits that it will keep rolling until the AFL makes changes to the way draft picks are awarded.

Allegations about coaches in the bottom four being more focused on draft picks than winning games has surfaced again with Melbourne and West Coast under the spotlight.

The issue has been distracting for the AFL, but Roos said it was up to them, not coaches, to put it to rest.

"There's nothing that coaches can do, it's really an AFL issue," he told reporters in Sydney on Friday.

"It's disappointing, everyone talks about it and it's probably time to do something about it."

"It's up to the administration to change the system and then if you change the system then there's no discussion."

Roos is no stranger to the tanking debate, despite his Swans playing finals every year since 2003.

He became the centre of an official AFL investigation last year after he allegedly told Jarrad McVeigh to go forward, but not to kick a goal during a NAB Cup match in Launceston.

While no finding was made against him, Roos said the debate would keep rearing until the AFL made changes to the draft.

"I've been talking about it now for seven years," Roos said.

"I'll talk about it next year if they don't change the system, I'll talk about it the year after if they don't change system.

"I get sick of talking about it but I can't change it."

When asked if he thought there would be changes, Roos was not optimistic.

"Well, based on what's happened over the past couple of weeks, probably nothing," he said.

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