Is This Why We Can't Live Without Money?

I just returned from an introspective journey which, as per the norm, provided me with a number of theories and curiosities which I will later have to reflect on further. But there is one concept that I brought back from my mind's journey that I felt worth sharing, and hopefully getting some further opinions on.

Any that have been paying attention to the words leaving their mouths will be aware of the fact that many words which are associated with money are also associated with water. For example;

If you are receiving money regularly then you have an "income stream".

Should you be struggling to make ends meet, then you are said to be "drowning in debt."

Money begins and ends at the "bank," and at that bank we will find a lot of currency. Clearly references to a river.

There's also the fact that if you have a lot of money to spend right now then that is regarded liquidity.

I am sure there are more but they escape me right now, and this is certainly enough to demonstrate my point. So now the question becomes, Why?

The English language is a very interesting one, being constructed using words taken from several others. I very much doubt that during the development of such a complex language, the decision to use similar words to describe water and money was made without a great deal of thought and a clear reason or purpose for doing so.

So while contemplating this, I believe I may have come up with a potential answer. I doubt this is something that I will ever be able to find out for sure, but I still find it interesting and enriching to ponder. If you have an idea of your own, skip to the comments section and share it before reading what I have to say. That way my own theory will not influence your own thought pattern.

The Theory

What is the most important thing we need to survive? I think if you asked that question on Family Fortunes, the survey would say that "water" is one of the top answers. We always hear from NASA how they have discovered a planet with water, and so this means it could have life. We ourselves are made of more than 50% water, and we cannot live for very long without drinking more of it.

So it is undeniable that everyone on this planet understands that water is critical to our survival. We literally cannot survive as a species without it.

I wonder then, if by using similar terminology to describe things associated with money, we are inadvertently ascribing that same importance we know water has, to money. I do not purport myself to be a psychologist by any means, but I have spent enough time in my own mind to understand how it works. So I feel that this is certainly something that could arise subconsciously within someone speaking this language for prolonged periods of time, and that this could very well have been a psychological tool used to sell us on the illusion that money is needed for society to function.

I am curious to know what you thinkers and philosophers feel about this correlation between money and water when viewed through the scope of the English language. Is it a coincidence or not? And if not, what purpose do you think this decision was made to serve?