[Jasper_]

Proof of Work doesn't determine which view took the most energy to arrive at. What it does is give a self-adjusting brute force cracking problem that takes 10 real-world minutes to perform, regardless of the amount of energy put in. The assumption is that 10 minutes is enough for even the slowest links of the network to get an up-to-view of the world, preventing double-spends or similar issues.