"It was one of the first issues we raised with her because in my opinion you can't punish these drivers because they are stuck in a system that's broken and regressive.
"The reality is, there would have been no practical way under the current resourcing to get them through the system because of the backlog," Murphy said.
"It could have ended in a situation where thousands of Kiwis probably wouldn't have even known they were going to lose their drivers licence and then they'd have been driving around unintentionally breaking the law."
He said the biggest barrier to gaining a full driver's licence in New Zealand was access and affordability.
"In my home region of Hawke's Bay, like many other provincial areas across the country, it costs an average $1000 to gain your driver's licence.
"This is severely disadvantaging people based on where they live and if they can pay for it," he said.
Murphy said the review covered most areas he believed needed improving.
However, he also wanted Genter to fully review the progressive testing system, including the benefit and value of sitting a final "Full Licence" test and if a Defensive Driving Course was actually delivering a positive outcome statistically.