The Whistleblowers Protection Act exists, but it is underfunded and ignored. Powerful bosses still use paperwork and technicalities to ruin anyone who disrupts their "eating" chain. When a whistleblower is blacklisted, then a headline about UGX 41 billion recovery won't make sense since it will not pay their rent or protect their family from the thieves who have been exposed.
The ruling NRM and its leaders are fortified in the belief that as long as they can master the numbers to support the party, President Museveni will always pardon them, even in the face of corrupt practices.