Sandy Parakilas, who worked with the company's platforms team in 2011 and 2012, said in an op-ed in The New York Times that what he had seen internally was a company that prioritised data collection from its users over protecting them for abuse.
Facebook recently faced questioning from the US Congress about posts and ads on its platform that are suspected of influencing the outcome of the US presidential election in 2016.
In the wake of these hearings, Parakilas said, there was no point in lawmakers waiting for the organisation to regulate itself. "Because it won't," he wrote.
"Facebook is free to do almost whatever it wants with your personal information, and has no reason to put safeguards in place," he wrote.
Recalling the time when Facebook offered popular social games like Farmville and Candy Crush, he said there were no protections for the data that passed through these games on Facebook to external developers. And there was no way to police misuse of this data.
The issue gained some mileage in the media, Parakilas pointed out, adding that the only way to stop this was for Facebook to threaten to cut off a developer's access.
"But when I was at Facebook, the typical reaction I recall looked like this: try to put any negative press coverage to bed as quickly as possible, with no sincere efforts to put safeguards in place or to identify and stop abusive developers. When I proposed a deeper audit of developers’ use of Facebook’s data, one executive asked me, 'Do you really want to see what you’ll find'?" he wrote.
"The message was clear: The company just wanted negative stories to stop. It didn’t really care how the data was used."
Given the reach that Facebook had it was urgent to put in place processes that made it accountable. What existed right now was "...a company that reaches most of the country every day and has the most detailed set of personal data ever assembled, but has no incentive to prevent abuse".
"Facebook needs to be regulated more tightly, or broken up so that no single entity controls all of its data. The company won’t protect us by itself, and nothing less than our democracy is at stake," Parakilas said.