I'll take my salary in salt

The word "salary" comes from the Latin root sal-, indicating salt.  It derives from Anglo-French salarie, Old French salaire "wages, pay, reward," from Latin salarium "an allowance, a stipend, a pension," said to be originally "salt-money, soldier's allowance for the purchase of salt."  

Now, that probably makes a lot of sense, since salt was so valuable in olden times.  But also!  The word "salad" comes from the same root, because the Romans liked to dress their vegetables and leafy greens in a salty dressing for flavor.  

Bringing the whole thing full circle, "lettuce" is slang for money (because they're both green), which is your salary.  So there's really a great reason to get salty over how little lettuce you're getting in your pay.