Well, so far, no cops or teachers or postmen or any other public employees (with the exception of congressmen and senators) are sucking the life out of anyone. Most of them are being payed a moderate income for their very difficult and important service to society.
Nor did the unions "suck the life" out of the American auto industry, since the American auto industry is still here and doing just fine, even as they still pay good union wages. Neglectful management cause the quality of American cars to get so bad that Americans began buying foreign cars, instead. And of course the neglectful managers blamed it all on the unions. But in the end, they updated their factories and their manufacturing practices to match the foreign car-makers, and they began making better cars. Americans began to buy them, again, and so they're still building and selling cars.