They essentially have, via the Supreme Court. McDonnell v. United States, Kelly v. United States and FEC v. Ted Cruz have all confirmed that it is more-or-less

They essentially have, via the Supreme Court. McDonnell v. United States, Kelly v. United States and FEC v. Ted Cruz have all confirmed that it is more-or-less impossible to actually prosecute politicians for corruption, so bribery is de facto legal even though there are technically anti-bribery statutes on the books.