Probably because he didn't give the police the runaround after the chase.
The suspended sentence means that any other offence at all, no matter how minor, will see him jailed.
Had he injured someone he would have been sent to prison summarily.
I do think that prison is for people who are an immediate danger to the public.
I do, however, think that the man is a bloody idiot - hopefully he will learn a lesson from this.
I also wonder sometimes, if the police perhaps push too hard? This guy is less capable as a driver than a Police UK Class One driver. Is this for the PR that the recorded chase affords them?