The idea of teaching a young kid about corruption at a young age will affect or impact the understanding of the kids when they are mature because their understanding will be small to understand what corruption entail.
I know some parents want their children to understand this around them at the early stage but we must also consider the danger inside it.
There's the danger and that's why it's better be taught early because some activities and norms that these kids may not could be the start of corruption.
While they're still young and little, they'll have the idea on what they should avoid and what it can be in the future. These kids are easy to teach but you need also to be careful with the wordings you'll use on them so that they can easily understand why it has to be learned.
And out of their own curiosity, soon they'll be the one asking questions related to it.