Estate agents are paragons of virtue by comparison.
One headhunter I used to work with had separate companies, identities and accents. He would place an applicant in one guise then fill the vacancy he'd created in another and kept a massive domino rally in perpetual motion. Industry churn was two to three years in role so it was easy money at £30-40k per placement and three to five placements per month.
He was never caught out and retired on his 50th birthday after 25yrs at it. He was in "real life" a massive, massive twat.