[ckannan90]

Not really. Employment is a trade of resources like any other. According to what you say, the employee is "exploiting" the employer as well, because he is trading his time and effort (which he values less) for money (which he values more). The trade works because both sides have opposite notions of value in the two things (time/effort vs wages).

Besides, the value an employee generates does not come from the employee himself (if it did, he could do the same task outside of a company and earn money). His effort is channeled through several other resources, including the efforts of other employees, capital and machinery, all of which was acquired and managed by the company. The company profits because the overall value generated by this system is larger than the sum of the value generated by any individual part. This isn't exploitation "by definition".