The phrase "on a bigger scale" means something is happening or being done at a larger, more extensive level than before. It could refer to an increase in size, scope, magnitude, impact, or complexity. For example, if someone says that they are planning their wedding on a bigger scale, it implies that the event will be grander and involve more people than originally planned. Similarly, if a company decides to expand its operations on a bigger scale, it means they plan to increase production, hire more employees or open new locations in order to grow their business.