People who have invested their life in excellence in a discipline other than politics are going to be beaten at politics by the power-hungry sociopaths who want to be politicians. So we always end up with unskilled, unethical people in government.

"The heaviest penalty for declining to rule is to be ruled by someone inferior to yourself" - Plato

This wasn't the case during the most of the modern history.

Ministers are (mostly) appointed from the pool of voted-for politicians, who are nearly all lawyers or politics graduates.

Well, there are hardly likely to do themselves out of a prime job, are they? But in a way they sort of do, they appoint advisers....

We could have a whole new official layer of experts, but that would be shot down by cries of bureaucracy.

Initially I like the idea of expert opinion being mandatory. So, like with the drugs advice, I would like to see government forced to adopt their proposals. But would I be happy with police experts forcing legislation? Doctors, probably, but army?

In the end, I have to come back to general population ignorance an prejudice. "We" have to smarten up, and vote accordingly. Its the only way I see.

Or in the British case at least, appoint people from the Lords who have got their through contributions to their fields.