Interesting of both the title and videos of professionals describing their description of Capitalism and very rightly so.
But then, let is progress a bit in to the not probable. If Capitalism was to fail, Germany would be a land of beggers tilling the land with sharp sticks and living in mud huts. But of course this is not to occure under present conditions. For as well known, Germany is a manufacturing and trade economy, every thing produced, is very carefully calculated to profit and loss.
My self am not an economic professional, these can be hired as needed, and released as required. But a person needs be not an economic professional to recognize the basics in the business of producing goods and services such as described in the last video concerning the term: Marginal Cost is easy to understand as the bases of producing a unit of product and profit or loss as follows:
Marginal Cost= Price charged per unit is greater then the marginal cost of producing one unit. In short, once produced and charged, this must be greater then the cost of producing. For each time this unit once produced and shipped, gains value with each transaction. For each transaction is added value as profit to the next transaction until its final distination to the consumer.
The following url provides a much better clarification of this process as follows: