Below are some extracts from a Planning Resource article, which suggests that some councils are using CIL as a mechanism for discouraging unpopular developments. 

Charging different rates for different types of development is extremely common - most charging authorities have taken this approach.  It is also clear, from the charges adopted so far, that residential developments and large-scale retail developments attract the most expensive rates. 

Interestingly, there is evidence to suggest that the more controversial developments (such as housing developments outside of existing allocations or student accommodation) do attract higher rates than less contentious schemes (office buildings and small retail schemes). 

To date, this has been justified on the basis that these developments tend to be more profitable than their smaller counterparts, but it is not hard to see how there could be a policy dimension to it.