It's because your maths is wrong. 140k is the number currently working on it. Not the total over the project lifetime. And given that the deaths were caused b

It's because your maths is wrong. 140k is the number currently working on it. Not the total over the project lifetime. And given that the deaths were caused by heat exhaustion not sure Empire State Building and arguably Burj Khalifa are relevant. Especially when skyscrapers naturally offer protection as you work your way up.