Henderson, spoke to news.com.au, and revealed that after 17 years of earning less than her co-host, she came to the conclusion that it was time to "finally take a stand."
"I've been in that situation over the years where you do get frustrated that the women aren't getting equal pay to men and they're seen somehow as less worthy," the 42-year-old said.
"You get to a point where you know when you're ready to walk and I think Lisa was obviously at that point as well."
Nowadays, Jackie O is on par with Kyle's $20 million dollar five-year contract.
Meanwhile, Kyle had a giggle at Karl Stefanovic's salary as it did not compare to the amount he rakes in.