Non Habitually Resident
The Civil Service have been driving away the values of the Social Contract for many years. The concept of the Social Contract is that people fund the government and as a consequence people obtain support from the government/society.
This concept has faded in recent years with a growth in means testing and a development of a system based almost purely on arbitrary need.
This causes a particular problem with the NHR test for benefits. If someone leaves the country to find work and then returns they can find that they have disqualified themselves from obtaining benefits. Similarly you need to live 2 years in the UK to qualify as homeless. If you are homeless abroad and wish to return then there is no support.
I encountered a problem where someone who had worked and paid taxes for around 35 years retired abroad then returned to the UK last week and basically found himself destitute. The situation is actually sadder than that.
The fading away of the social contract and social queue is causing resentment and undermining people's willingness to pay taxes. (They pay ... they don't get.)