I didn't say that ending corruption would "support this thingie", I identified corruption and associated crimes as an appropriate source of funding for a BI initiative, namely because there are economic studies that estimate losses to shadow economy practices to be as as high as 13% [1] to 26% [2] of a some countries' GDP.

[1] the figure by Portugal's official statistic (same article as below) [2] the figure calculated by an independent think-thank focused on shadow economy studies (https://www.publico.pt/economia/noticia/-economia-paralela-c...)

PS: these numbers are focused on Portugal for brevity, but you'll easily find similar studies if you look up Transparency International.