I think Breyer is pretty honest at least that his goal is equity rather than some abstract philosophy. Unfortunately this does tend to lead to balancing tests rather than bright line rules.

Conversely, it could be said Scalia twisted the idea of "originalist" to suit his political ends. Heller in particular is a very consequential ruling that basically invented a new right under the second amendment from whole cloth. When originalists complain about "activist judges" it can seem intellectually dishonest.

There's also a good question about how originalists can even support Marbury v Madison and the concept of judicial supremacy in the first place, since it doesn't originate in any law. Right now they support it because they have durable power in the courts.