Have you noticed how someone who is promoted internally seems to enjoy doing the same job they had before? There is a natural comfort in knowing the topic.
It is akin to what follows the familiar line If I were in charge we would ... which usually results in a rather narrowly-focused solution largely based on the person's current job rather than one which takes other factors into account.
Our new PM is certainly following this trend with her interpretation of the referendum result as being all about migration (which she failed to control in her previous job) and squeezing the European Court of Justice (with whom she crossed swords in her last job) out of our affairs.
It is sad that the economy will need to be sent down the pan to overcome her previous failings.