Let's say for example you need a permit approved by the CITYNAME Department of Buildings. CITYNAME is slow to process permit applications, but it is common knowledge that using a particular expeditor consulting company actually helps to get your permit approved quickly. It would definitely be newsworthy if that consulting company was owned by a spouse, sibling, parent, cousin, etc. of someone in the building department. I personally know someone who was not able to open up a store in a city I lived because the inspector literally said something was deficient and recommended some local company nearby to "fix it" for approximately $50,000.
It is a similar reason why working in an investment bank, at least in the US, you have to agree that both you and your close family members must agree to trading restrictions so as not to pose a conflict of interest with any of the bank's clients. If such a restriction was not in place, then it would be easy to just pass insider information to your spouse or brother and have them make money based on news that is about to be announced.