Because I don't believe the fine will be as huge as people are saying.
It would be a long term investment, not a short term money grab.
The long term ramifications for VW far exceed the 7.5 bil they set aside for this. Hell Ford set aside 5 bil and that was just for replacing defective tires.
Here is a summary of the fines and costs as I predict.
VW cannot simply re-code the cars to pass, they will have to refit Add Blue systems that will cost about 5k each at 11 million cars worldwide that is about 50 billion. (2.5 bil in USA alone)
Lawsuits from owners that were duped figure just for the USA alone if you gave each owner $2500 that would cost VW about 1.25 bil. Recently Kia/Hyundai settled a class action for claiming their cars got a few MPG than they really got and had to pay each owner about $500, so $2500 for flat out lying to people and claiming they were clean and green is not unreasonable.
If you take that number and apply it to the 11 million effected cars you are talking about 27.5 billion in costs.
Then you have the EPA and CARB fines that will likely be in the billions, and now that Europe is getting on the bandwagon the total fines could be 10 to 20 billion total.
If you take the costs to fix 11 million cars at 50 billion, class action lawsuits that could run 27.5 billion and the government fines that could be 10 billion. VW could be looking down the barrel of costs near 85 billion after this all said and done.
That does not even begin to total the loss of reputation for the company, which at this point is as low as it could ever get. Given the market has devalued the stock by 40% in two days, I think it fair to say that people that know what is going on have agreed this company is fucked. In all likelihood the stock will continue to decline and some other company will buy them out and clean house.
This situation makes the Audi unintended acceleration problems in the 80s look like a walk in the park, and in that case they proved in court they were not wrong and it still nearly BK Audi in the USA.
VW never fully recovers from this.