What is Moonlighting: An ethical dilemma and a corporate conundrum

So, what is Moonlighting?
And why it is mired in controversy and a bone of contention between employers and enterprising employees.

What is Moonlighting?
Moonlighting is an innocuous sounding work that came in greater focus as the pandemic induced remote work culture shifted employees into the confines of their home. Moonlighting indicates a situation in which an employee works more than one job – typically one full time and one part time.