One of the problems that gives more power to the executive order is the bills Congress passes are poorly worded, vague, and novels instead of bills. The lack of distinct meanings and directions gives power back to the executive branch to decide the details. That is not the intent of the Constitution.
Constitutional Authority for Executive Orders
Article II, section 1 of the U.S. Constitution reads, in part, "The executive power shall be vested in a president of the United States of America." And, Article II, section 3 asserts that, "The President shall take care that the laws be faithfully executed..." Since the Constitution does not specifically define executive power, critics of executive orders argue that these two passages do not imply constitutional authority. But, Presidents of the United States since George Washington have argued that they do and have used them accordingly.
When Congress writes bills no one can figure out, power is added to the executive branch.