"What lead the govt to bring in cops of different backgrounds?"

Simple QL, equal opportunity. However they invented a new term which is called 'positive racism' or 'positive discrimination', meaning that a native can be rejected based on the fact the he is not a minority. Also choosing females, regardless of CV/Experience, over males has to do with this. All political correct bullshit.

The best man/woman for the job regardless whether he/she is black, white or green.