So, if you were accused of raping someone, you should just suck it up and go to jail and just because you have money, you are guilty, right? Not supporting Sam here, but this kind of thinking sets a dangerous precedent.
That's just how it is. In the US he gets to not go to jail in a justice system where nobody believes he's actually innocent, because he has money.
The concept of "trial" has changed a lot over time, even in English Common Law.