The good news is: Regardless of labels (like Overhead versus G&A), so long as expenses are recorded in the same account, consistently, in like circumstances, the label or pool might not matter. The difference between Overhead and G&A depend on how your company, consistently records a type of expense.
Noun. 1. mover and shaker-a person who wields power and influence; a shaker of traditional beliefs; movers and shakers in the business world. shaker. individual, mortal, person, somebody, someone, soul-a human being; there was too much for one person to do.
Origin. The expression 'movers and shakers' is now most often applied to the rich and powerful in politics and business. In a year (2009) in which the movers and shakers of the financial world brought us to the brink of ruin, it is worth a thought as to who the original movers and shakers were.