Will the uploaded good humans still stay good once they are uploaded?

What is the test to make sure that a regular (though very smart) human will remain "good"?

Don't we have to select from a small pool of candidates who have not succumbed to temptation to abuse power?

I have to say that I can think of very few candidates who would pass muster in my mind and not abuse power.

Even here: Reading through many of the posts, we have widely conflicting "personal utility functions" most of whose owners would consider to be "good" utility functions and yet those who do not hold the same personal utility functions could consider the utility functions of others to be "bad".

To my way of thinking it's incredily risky to try to upload "good" humans.