The movie Seven taught me that the seven deadly sins are wrath, greed, sloth, pride, lust, envy, and gluttony. It also taught me not to open up any boxes delivered by a truck in any desolate place. Seriously, there are many mistakes that retirement plan providers make that are essentially deadly sins because they threaten the existence of that provider. So this article is about seven deadly sins that plan providers should avoid if they want to stay in business.