Shouldn't street lighting posts last longer?

While shooting pictures for this blog, I noticed that the concrete streetlight post I was using to steady my camera was cracked. It had a big, vertical crack extending for many inches right up through the centre of the post. This post would need to be replaced.

I'm not sure who made the post in question but I know a lot of concrete streetlight posts are made in Burlington, Ontario, by the StressCrete Group. These posts look good when new. That said, shouldn't these posts look good after a few years of use as well?

Cities are expensive. Replacing relatively new cracked concrete posts seems like an expense that would blind side the city. I wonder if these posts come with a guarantee or a promise of a minimum working life.