In the employment relationship, which is a contractual
relationship that imposes obligations on both parties, the primary
performance obligation of the employee is the obligation to perform
(work), while the primary performance obligation of the employer is
the wage payment obligation.
Since the primary performance obligations are the primary
matters to be fulfilled in the debt relationship; they are
independent from the secondary obligations. Secondary obligations,
on the other hand, are that provide benefits for the realization of
the contract in accordance with its purpose and the fulfillment of
the expected benefit from the performance, and even the protection
of the personality/property of the other party to the contract.