The 3-legged stool was CREATED by the Founders. You know those guys who wrote The Constitution? They weren't fooling or joking or teasing. They were SERIOUS.
Three branches of government that are ABSOLUTELY EQUAL to one another. Why? Check-and-balance system only works if the powers are equal. Just because one clueless uppity leg keeps trying to lengthen itself thus destabilizing the stool doesn't matter. What is legal is what is legal and what is legal is THREE EQUAL BRANCHES OF GOVERNMENT. Those who don't like it need to get over it. The Executive Branch is no more powerful or important than the LEGISLATIVE or JUDICIAL. Why is that FACT so hard to grasp/comprehend/understand for so many people?