On the subject of transparency reducing corruption, I think we are all very aware that it depends which side of the political divide the person accused of corruption is on to determine how it is treated. With Trump we had about 6 years of all sorts of hare-brained accusations without supporting evidence which required forensic analysis of everything the guy did, without finding a smoking gun. People making these false accusations were not punished for doing so. The ultimate in transparency.
With Biden, the subject of this thread, there is a giant trove of evidence of potential misdoings(and certainly proof he lied about overseas business) which was falsely dismissed as being foreign disinformation and is generally censored. People that honestly and fairly try to discus and understand what the evidence proves are normally punished often banned outright from social media sites. The ultimate in opacity.
Yet you say that "Trump and the Republican party have actively fought such transparency". Clearly the opposite is true.