For more discussions of giraffes.... see here
The unbalanced development of the giraffe's anatomy led paradoxically to a situation where his neck became too long for his legs. Although the long neck enabled better reach of the high leaves, his neck became too long to enable easy reach of the low lying water. Bizarre but true.
This tends to happen also in organizations where there is an unbalanced over-fixation on certain parts of the KPI, and and losing sight of the original mission. It's just too easy to chase after certain KPIs. People become comfortable and predictable.
George Yeo was spot on in his observation that from time to time, it is necessary to shake the box.