Therefore we must pay much closer attention to what we have heard, lest we drift away from it. For since the message declared by angels proved to be reliable, and every transgression or disobedience received a just retribution, how shall we escape if we neglect such a great salvation? It was declared at first by the Lord, and it was attested to us by those who heard, while God also bore witness by signs and wonders and various miracles and by gifts of the Holy Spirit distributed according to his will. (Hebrews 2:1-4 ESV)
The author appears to be arguing in the past tense, as if to say that every transgression or disobedience has already received a just retribution, but considering the fact that the day of judgment has not yet taken place, it doesn't seem like that is possible.
What does the author of Hebrews mean?