Politicians as a whole are known for lies, deciet and corruption. It's not limited to one specific party nor country. The visibility of corruption may change, but its presence never will.
The Good Law Project is a great example of the kind of organisation that investigates this. The Guardian does good work here too. I'm surprised to say it, but even Labour are making noise about it in Parliament. This is historically unusual and a sign of the return of the Old Boys' network. It is a bad sign for democracy.
https://goodlawproject.org/case/end-to-cronyism/ is a good start to read from.
Jeeee-zus.