The Sarcaaxus Nation only take up contracts when their sarcaaxi deposits are getting low. Otherwise they stick firmly to the mining of the precious gem.
Any person who has sarcaaxi in their possession, haven gotten it not through Sarcaaxus Nation, becomes a target for their assassins. Their assassins are well paid mercenaries and use nearly every means available to hunt down and terminate their target.
There are several other mining corporations in Marazan that interfere with the Sarcaaxus Nation's attempts of mining.