Despite your unnecessarily pessimistic comment, this is one of the leading ways that White Collar criminals (rich people) do see consequences

Martha Stewart?

Well, good news. He isn't rich anymore.

More accurately, this doesn't happen except in "egregious" cases. Otherwise, if the judicial system tried to prosecute people for all lies under oath, they wouldn't have time for anything else.

Seriously. Ask someone who works as a judge or a lawyer.