[amanaplanacanal]

The thing is: if Congress thinks executive branch agencies are interpreting laws in ways they didn't intend, they can change the law to clarify their intent. If they fail to do so, I have to assume the agencies are doing what Congress intended. But the supreme Court evidently disagrees.

[Ajedi32]

Only with the willing cooperation of the executive branch, or a veto proof majority in both houses. Otherwise the very executive they are trying to reign in could just veto the bill to allow the agencies to continue overstepping their authority.

But that's beside the point anyway, because it shouldn't have to be the legislature's job to be constantly weighing in on whether an agency is following the law as written. That's literally what the courts are for; to interpret nuances of the law.