It sounds like a horrible plan. How about attempting to learn things and, you know, improve yourself instead?
God forbid someone takes a class with a motive other than learning. Unfortunately, unlike you armchair critics, some of us have to live in reality.
While I disagree with Lex's reasoning, I would shy away from taking courses that are obvious GPA boosters in my final semester. If an adcomm sees that you have tried to boost up your GPA with 'coaster' courses, that may negate the minimal GPA increase you stand to gain. Then again, I probably have no idea what I'm talking about, none of us do!
For schools that index, I anticipate the GPA gain would minimally increase your index, and the rigor of the courses will be clear when your file is reviewed in depth. For schools that do not index, the lack of rigor in the courses (relative to the rest of your file) will be quite visible.
I don't think the risk of how an adcomm would interpret is worth the potential gain.