Governments become self-interested entities. In fact, when establishing the capabilities of a government, designing around this fact is paramount.
Unfortunately, many strong men governments around he world have rigged their elections and/or face weak enough oppositions that they have been in power for way too long, in which case this does indeed become a possibility.
> Most governments don’t remain in power for more than a few years. They are constantly changing. Which prevents what you’re suggesting from happening.