Let's say she has ten employees. They all voluntarily agree to work for her: slavery is illegal, so people work for others on a consensual basis. Both the employer and employee negotiated and consented to a salary or wage schedule for that employee. The employer pays the agreed-upon compensation, and the employee receives it.

If the company makes an unexpectedly large profit, the employer is not obligated to redistribute that to her employees in addition to the already agreed-upon and paid compensation. If the employees think that what they agreed to work for is no longer sufficient, they are welcome to renegotiate their compensation or, if they feel they have been wronged and are being paid less than they are worth, to take their talent to a different employer. After all, everything so far has been consensual. The only thing that would be non-consensual would be obligating the employer to redistribute her profit over and above what had already been negotiated.