Indeed, blockchain governance is one of the key challenges for any system that seeks to implement it, public sector or otherwise. It's all about striking a balance between decentralization and efficiency.

In Bitcoin's case, consensus rules are hard-coded into the protocol itself. Nodes agree on a set of rules and only accept blocks that follow those rules. This makes Bitcoin resistant to change unless there is overwhelming agreement among participants.

For public sector applications, things can get trickier because you're dealing with various stakeholders with differing interests. It requires careful design and planning to ensure fairness while still maintaining efficiency.

The beauty of blockchain technology is its adaptability - it can be tweaked and tailored as per the needs of specific use cases. There's no one-size-fits-all solution here; every application will have its unique set of challenges requiring distinct governance models.

As we delve deeper into this realm, I'm sure we'll see more innovative solutions emerge addressing these very issues!