dkp point systems

[Enma]

unless they were friends iwth the LS leader or were with the LS from the beginning

You're describing a bad working DKP System, and the fault is of those people who set it. There are many different DKP Systems, and each one has its own pros and cons, but all of them can work only if Leaders are fair people and manage them with care and fairness.

I don't think that a Random System could be fairer, because it essentially doesn't pay your efforts but your luck, and in a Guild or whatever it can't work.