He sped off when police tried to stop him and passed vehicles on State Highway 1, Otaika, at 85km/h in a 50km/h zone.
While trying to swerve around a vehicle, his car flipped on to its side after smashing into an oncoming vehicle head-on. His car slid into the path of an oncoming people mover, its driver suffering a fractured shoulder.
Soutar-Whatarau's unrestrained son had a fractured ankle and an abrasion to his forehead. Police tried to help Soutar-Whatarau exit the vehicle but he responded aggressively and resisted arrest.
By driving in the manner Soutar-Whatarau did, Judge Orchard said he perpetrated indirect violence on his children.
"Here you have a person who was driving while disqualified, he'd been drinking and even had cans in the car, he was in breach of a protection order, had his estranged partner and his two children in the car and one was unrestrained."
In May 2013, he was convicted of driving with excess blood alcohol and in March 2017, Soutar-Whatarau was convicted of refusing to give a blood sample and driving while disqualified.
"He could have been standing there with two children dead. He's a very lucky man. He really doesn't have an insight into what he did. He didn't have a thought for anyone else. It was straight selfishness," Judge Orchard said.
"Anybody in any of those vehicles could have easily lost their lives because of your selfish behaviour."
At the conclusion of his sentencing, Judge Orchard said she hoped as Soutar-Whatarau got older he realised the impact of his driving on other road users.