You said that unemployment will increase, but I don't think so. Think another way, jobs that just using body will decrease, but jobs which are associated with robots and use creativity will increase. Robots can't think creative. They just act what we have entered. Second, you say that the purchase price of robots is quite high, it's fact. But the price of robots will decrease a lot when robots are more popular. And if robots purchase price is quite high, using robots are better to save money. Because we don't need to give them salary, or bonus.