You're on to something... public health is proving to be no more scientifically-valid than in the old days when rulers used fortune-tellers to make policy decisions. In fact public health is even less scientific given that many of them are easily bribed by Big Pharma or other bad actors.

At the very least, two ideas come to mind:

1. Require any public health officials with authority to waive all rights to constitutionally challenge evidence used to prosecute them, if say an NSA/milintel intercept, whistleblower or Wikileaks document shows them to be corrupt. Sufficient technology already exist to determine if any document is faked.

2. Mandatory random brain-scanning of public health officials, i.e. functional MRIs to weed out those who are taking bribes on the sly or are being manipulated. Current forensic auditing and anti-corruption laws are insufficient as there exists multiple ways to evade them via accounting and legal trickery.