Can raptured believers help loved ones left behind? No biblical basis; Paul implies post-death impact ends

Mike says there is no biblical teaching that the departed can do anything for the living. Attempting to contact or seek help from the dead is forbidden in Scripture. Praying to saints is a related error that replaces prayer to God. Paul's Philippians 1 argument (stay alive to benefit you) implies post-death ability to impact the world ceases. Ecclesiastes also implies this.