Yes, I suppose a politician can build a platform out of just about anything, and shaft a section of the society in the process.
However, that doesn't appear to be the immediate threat. The immediate threat is the DfT (no doubt the CAA, being the official consultant to the Govt on aviation matters, is behind this one, being squeezed by EASA on cost control, and looking for extra income) and then EASA will be next but that won't be for a few years (consensus takes time).
In GA, there is always something to worry about. Your airfield will probably get sold to some house builder before foreign reg planes get comprehensively kicked out ... one has to deal with one threat at a time and enjoy flying in the meantime.