That's not what happened at all.
When the union left our company, profits improved and management was able to upsize the staff. The adversarial relationship between we workers and the bosses vanished. Additionally, the burdensome work regulations that actually were detrimental to the employees were eliminated. For example, the turnaround time rule was tossed, allowing those of us who desired to work additional hours with some nice paychecks.
The deadwood was eliminated. Over a period of months, just about all of those who voted in favor of unionism during the decertification election were fired. I'll confess to taking real glee when a 25-year vet of the company was dismissed. He was a bad seed from the get-to, a featherbedder who thought tenure and seniority were his protection. When I engaged in the action to bust the union, this hateful creep uttered these words: "I was here when you got here and I'll be here when you leave". The Na-Na-Hey-Hey-Goodbye song was popular around that time and we who were loyal to the American spirit of free enterprise gave that union goon a serenade as he slinked out the door for good. This guy and his fellow unionistas were the real communist sympathizers since they favored collectivism.
Good for them.