I can't stop wondering why do the people of the UK and Ireland allow legislation like this to exist.

Because in modern democracies it's not we the People writing laws. We vote someone with good enough promises and campaign, but when they're up there they pretty much do whatever they want. And voting for the other side doesn't make as much a difference as you'd think it will.

This seemed a reasonable way to make sure decisions are made by competent people rather than the crowd. But today this seems becoming a scam.