So if one country creates an environment where those who have done well for themselves are suddenly stung with a massive hike in the money the state wants to confiscate from them, they cannot be blamed for wanting to rearrange their finances, their domicile or even their nationality.
Aside from the sheer inconvenience of having to call for assistance or hike to the nearest gas station (and hope they have a fuel container available), suddenly hitting empty can put a driver and passengers in peril.