They have been able giving high returns on capital and even if that wouldn't work for some years, I see no reason in your arguments above, why this should ultimately end. (brooklyninvestor.blogspot.ru)
Stocks give the highest return over the long term. (policybazaar.com)
Looking through your credit cards and seeing which will give you the highest return for your purchase is a good plan. (creditcardsmarts.org)