> Via passage of laws, Congress over the years has chosen to delegate a lot of responsibility to the executive branch

Part of the reason for this is that 2-year presidents are more common, they make promises within the first two years and even if they meet them, it can take years for effects to be seen in the general population, so the party loses majority in the midterms and then nothing happens politically for the remaining two years. Congress is often slow and burdensome (for good reason) but it always makes out for a disenfranchised voter base