Here is what I think and my opinion:
One of the problems is that the Investor category has shifted its investment into booking of new cars. This has increased the demand on the car manufacturers to provide cars to meet the demand.
Because of this demand and supply problem, the common man is is left with the choice to wait for a period of 3 to 6 months for the delivery of the car or to pay the premium and get the car immediately. This is what the investors want; the premium and they are getting it.
The solution to this is to either have the car manufacturers manufacture more cars to meet the growing need of the consumers. Theoretically, if this happens there can be a waiting period of let's say a week.
The second possibility is that everyone takes a strong stand and does not buy cars on premium no matter what. If this happens, investors will immediately loose interest, and the consumer can get the car within reasonable time.
The third option is that Govt. reduces the import duties on the cars and facilitates the process, so that a person can easily import a car and its parts without any complications or heavy duties. If this happens the demand on local assembled cars would decrease and then perhaps speedy delivery may be a possiblity.
I guess in this situation it is for us to decide collectively whether to pay the premium and live with the present situation or refrain from it and hopefully things might change.