If I may add: there is also evidence in Ireland suggesting that when citizens have access to this info, their trust in political parties improves. The same applies to conflict of interest declarations of TDs (also a Pdf list) Empirical evidence:
onlinelibrary.wiley.com/doi/full/10....
The effects of transparency regulation on political trust and perceived corruption: Evidence from a survey experiment
Scholarly evidence of transparency's beneficial effects on trust and perceptions of corruption remains debated and confined to the study of public administration. We contribute to this debate by exte...