It's more likely Bitcoin mining will become part of many government budgets (or contractors) so they can set mining fees for taxes.
Maybe, maybe not... but maybe also some caution is warranted when the protocol is shifted to make it so?
The result could be that we end up with either: it is government mining, or no mining.
When the door is closed to private individuals (and it is only businesses), businesses MUST register or be in violation of the law and risk seizure of all assets. This is true most anywhere you stand on the planet.