So we'd need elections to choose who writes the tests and then who gets to vote for them?
The great thing about democracy is that no matter what goes wrong to the country internally, the blame lies with the people who voted for those politicians, or didn't bother to vote, which is most people. It's a way to thrash out difficult decisions where the people deciding are the same people who end up affected by them. There are gaps in this idea of course, like persecuting minorities and voters being more concerned about their tribal membership
In the US, we've had variations of that in the US under the guise of a literacy test.[1] Promoting "understanding" sounds like a great idea until the test itself is made a weapon against groups that are considered "undesirable" by the majority of the populace.
In the abstract, this is true.
In the perception, it's always the leaders that screwed up - or whomever they can blame.
In democracy, as with most politics, perception is reality
Is that a public event, too?
Who gets to enforce the public-vs-private thing?