So, even if you built the vehicles by hand using human beings, you could decide to use under paid labor that do not earn enough to by a vehicle of any kind; new or used.

So, even if you built the vehicles by hand using human beings, you could decide to use under paid labor that do not earn enough to buy a vehicle of any kind; new or used.  You will eventually find that you have no consumers for the vehicles on mass.  They will buy food, shoes and clothing and the vehicles will sit in the yard. You don't need human beings to build vehicles in the same way that you don't need them to make bread. Are you deaf? Are you dumb and blind?  Labor is not the issue.  This is because labor is now automated.  Human labor is essentially redundant!  Say WOW!   Have you seen the assembly lines that were designed by Ford and then by GM in the 1930's that were automated and that only required four people?  They assembly lines were rejected and sent to North Korea and used to build the first Hyundai vehicles as of 1930.  The Americans in the 1960's were actually spying on industrial activity being funded by covert American and British industrialists.  Oppenheimer understood the value of a human being; native Northern Amerindians who were brought to North Korea as of  1920.   Kuster is a criminal; remember? The reason why the Americans rejected the assembly lines is because the human workers had to keep up with the machine track that kept moving and the American employees didn't want to have to do it.  You could decide to build the vehicle anyway you want and then pay every citizen some participatory remuneration in the region of $40,000.00-$50,000.00.  The truth is that the government does not make any money until a vehicle is sold.  So, if consumers buy more vehicles and spend more money generally, then the government earns more money. Governments also need consumers to generate income.   The government earns 10%  generally speaking on the sale of any vehicle whether or not it is new or used.

Everybody else who understands the theory of lost energy has not argued with the static and constant value of labor in manufacturing as labor is automated as much as possible and where possible. Once this happens, you can ignore your consumer who will have no source of income if...if you do not answer the missing variable as to where will we get money if he cannot labor to earn it since labor is redundant? Maybe everybody becomes a mechanic. Maybe everybody becomes a barista. But, will you earn enough in either profession to buy a vehicle?Travel agents are on the verge of redundancy in addition to hotel front desk staff. Just use the automated terminals at the travel agency and swipe your interac/debit card if you don't want to pay online with a credit card. Just print your hotel booking and then when you get to the hotel just hold the bar code on the printout under the bard code reader or swipe your credit card through the machine.  

For instance: Investment in raw materials+labor(paid money earning human)= money returned on investment + consumption of produced goods.  Alternatively in the new reality where human labor is not required and is redundant, Investment in raw materials +Labor(automated)=zero.   To ensure there is money and consumption, you need to re-balance the first equation as follows: Investment in raw materials+labor(zero money earning automated) +(paid human in money in participatory remuneration)= money returned on investment + consumption of produced goods.

 You could keep following Keynes for sugar and tomatoes from Brittany and have your open air markets you artful !#@!# dunce dodgers; scalawags and pick pockets!    We see your theory in your practice: English; speak the English. Have you had the English breakfast tea?  Maybe you should and wake up! You don't need to build the vehicle to make tax revenue as the other countries have discovered but you need to make tax revenue selling the vehicles. But, somebody will have to build vehicles; right? But, more importantly, you need to be able to sell them to people who can buy them with some kind of income.   Follow the law of averages and ask who wrote Keynes and stuck you in the head with the Keynesian dagger about economies of scale.  Is France, Germany and Korea better than you? Are you gay? Sing a football song every Sunday; innit but you don't want to go to church and feel your Saints; innit? Where is Richard the Lionhearted; innit? You don't have to build the vehicle but sell sell sell, give the English peoples of the world money money money so that they  will have as much hegemony hegemony hegemony as..De Europeans and you are not or De Asians and you are not. So, what's in  FHM this week mate? Is it Honey Tosser?    Where's the Ford Cortina right down your aerial. Make us proud son. Now, don't think it. Do sommeing! Remember the beer commercial. Did you tell someone to believe for about 5 years! He heard you although he realized it wasn't a personal message with his name on it. But, he did believe.