Bingo.
"Power tends to corrupt; absolute power corrupts absolutely."
American voters are constantly told that the key to paradise is just putting the right leaders into office. They need to be told that the real problem is systemic--too much power in too concentrated a form.
You make somebody a Czar, and the odds that it will improve them as a person are not great.
If you look at Lord Acton's phrase, you realize that the solution is not to try and find people who are somehow incorruptible, but to reduce the power.