Informal work should still be governed by “formal” employment contracts
There is certainly no “one size fits all” model when it comes to a written employment contract. The agreement doesn’t need to be long or complicated… or “formal”, but it is perhaps naïve in today’s work environment, including in the “gig economy”, to believe that the good natured feelings present at the beginning of the work relationship will always be there, or that you’ll part ways with a temporary or short-term employee on good terms in every instance; or to believe that everyone is in agreement as to just how “independent” the employee is.