That's a quick way to get the Google "death sentence," where they reset your rank to zero. They've even done it to a lot of high-profile companies.
But they have no problem with simply paying to have your rank improved. I have a couple of pages that have been up for well over a year with specific and unique text. I submitted them to google, but they never show up in searches. It isn't important to me, but it aroused my curiosity about how they search.