Not sure how this improves Australia's chances of hosting 2022. England was never really interested in 2022 as 2018 has been designated to a European nation. This sounds more like England and the US have done a deal to support each other's bid
http://www.heraldsun.com.au/sport/england-to-withdraw-2022-world-cup-bid/story-e6frf9if-1225931351657AUSTRALIA'S chances of securing the 2022 soccer World Cup have improved dramatically with England announcing it will "almost certainly" withdraw from the race to focus on its 2018 bid.
That decision is dependent on the United States withdrawing its bid for the 2018 Cup.
An English withdrawal would leave Australia competing with the US, Russia, Spain-Portugal, Belgium-Netherlands, Japan, Qatar and South Korea for the 2022 tournament.
David Dein, international president of England's bid, said it was "almost certain" that England would put all their energies into a bid for the earlier tournament.
"It won't be long before the United States will withdraw from 2018 leaving themselves a run on 2022," he said.
"Consequently we will almost certainly withdraw from 2022."