Once upon a time, when you searched for “Manchester SEO” or “SEO Manchester” you received a 10-box local listing. It was not, perhaps, of the best quality as SEO firms tend to be competitive, but as everybody was doing it slightly against the rules, there was a level playing field.
Then Google decided to banish local listings on SEO-related SERPs. Sometime shortly after that, the local result for the two searches above reappeared – with only one business showing.

'Manchester SEO' - the only SEO business in Manchester
The problem is that this one listing is for an agency of dubious repute, doing everything wrong – yet the numerous high-quality SEO agencies in Manchester, with Places pages adhering to Google’s TOS are still being frozen out.

Intelligent Business Solutions homepage isn't even finished.
Let’s look at the Places listing itself:

The business name in Places doesn't match the actual business name.
Despite Google insisting that businesses should use their real business name on their Places page rather than using keywords, this business is clearly getting away with keyword spam on their listing.

The owner has rated his own company - bumping up his ratings.
This business owner has also given himself a 5 star rating while responding to negative criticism, thereby bumping up his own ratings. I’ve reported this as spam myself, but Google has taken no action.

Reviews that are clearly fake - they sound the same and are incoherent.
Then, if you look further at the reviews you find these two gems – incoherent reviews talking about ‘Optimisations’. Both sound like they were written by the same person. As someone who moderated reviews at a large consumer review website for 3 years, I would, in my professional opinion, guess that these reviews are fake, either paid for by the business owner from one of the less-than-salubrious services available for such activities or added by the business’ own outsourced SEO team.
Either way, this Places listing pretty much has everything that a Places listing shouldn’t have in order to offer legitimate information and advice to searchers.
So, why has Google left this listing here?
Well, the paranoid voice in my head tells me that maybe Google is aware of the poor quality of the local results for this SERP (and other SEO-related SERPs) and they’re trying to teach us all a lesson about what spam does to harm legitimate businesses who aren’t breaking the rules.
Maybe Google wants us to feel a small amount of the frustration that business-owners feel when they see SERPs taken over by poor-quality content spam or businesses trying to game the listings using black hat link building tactics.
I mean, Google could be broken, just on SEO queries, but somehow I doubt it.