Do you scale Agile vertically or horizontally?

Most attempts to scale Agile struggle because the IT leadership attempts to scale up (vertical) rather than scale out (horizontal). Scale-up is old school management. It involves context-free management by numbers, standardized metrics, reports and dashboards and workforce motivation by targets and incentives. Inside IT, this approach usually ends up scaling supervision (not management) without improving IT performance. This is why we find managers functioning as supervisors and Scrum masters...