I knew this situation, while discussing this in office one of my colleague said, consider an example of an employee joining new company, company don't have the car ready for this new employee, now they have 2 options, either rent a car for few days till the car is arranged on booking or Buy a car from market on premium with of course immediate delivery, this can save company from paying car rent which can be more than premium if they had it for say 4 months, now what is right then, pay the premium or rent a car. For me it is better to rent a car and wait till the booking time ends, because this is right option.
I specifically said, people who buys goods for hoarding purpose just to make money on it in the time of shortage are not doing something considered as legal and you know that many dealers do this. In this type of system you can easily see that Rich can manipulate the society, which can create imbalance, for e.g. I have 1 crore, since new corolla is coming, I booked 5 cars on booking then sell them on premium for immediate delivery, Now if this had not been the case then these 5 cars would be with genuine owners already.
And when i say both parties one who ask for premium and one who gives the premium were doing wrong because you know when there are buyers (demand) then there is a market, similar case is with stolen goods, specially mobiles, if we stop buying stolen cell phone then this market will eventually ends.