I think we forget that the tribunal is concerned with breaches of the act.
Sure its annoying that people lie ( shock horror). At the tribunal the member listens to the evidence provided by both parties and decides sometimes which is the most credible version of events
Sometimes it’s a case of he says, she says. The member was not present , so makes a decision on the evidence presented. I guess sometimes they may get it wrong, but that does not make the system bad.
Both parties have their version of events, otherwise they would be in agreement.