Actually, you should read up on your Supreme Court jurisprudence. The Court, led by Justice Thomas, has begun to read the text literally. If you notice, there is no requirement that a search be made after a warrant is granted. Instead, it protects people from unreasonable searches. WHEN a warrant is issued, that warrant must be based upon probable cause. Generally, it has been presumed that a search of an area where a person has a legitimate expectation of privacy is only reasonable when done pursuant to a warrant. This view, though, is not the only one. The Court has begun to evaluate a search as whether it is unreasonable - not merely if it was done pursuant to a warrant.