When leadership asks for an increase in velocity, there are a few common behaviors that occur. Each of them are an attempt to satisfy the potentially unrealistic ask.
It is intriguing to me how often a manager will make a change such as this to a system of work and then later proclaim that the team is gaming the system. This is simply not the case. In fact, the gaming of the system is the improper application of targets or goals for lagging indicators. The rest is just natural consequence.
You can find more on the topic of velocity and metrics for agile teams in my book, "Escape Velocity".