By now, you may be passingly familiar with the guardianship grift in our country. Last Week Tonight even did an episode on how disturbingly easy it is for a stranger to gain control and exploit the life of a senior citizen for personal financial gain. J Blakeson takes this conceit and use it for his vicious, brutal new movie I Care a Lot, expanding the concept to show America as one big scam where the only active players are the predators. It’s a pointedly bleak starting point, but Blakeson and his cast handle the concept with a cool, detached …