The Raiders have fucked up their cap, it just hasn't hit yet.
The rest of the teams haven't had the talent to push the cap. Its chicken and egg.
edit: actually the dolphins are going to be in cap hell soon enough too. Your list is a list of bad teams with no real bearing on your argument. I assume you grabbed a list of bad teams and did no research as to their cap situation whatsoever meaning you didn't make an argument at all.