And this is the mistake you are making. The money does not come from fees in any significant way. You are not really paying for the transaction. The transaction is paid for by mining new coins (and indirectly paid by everyone owning Monero, because adding coins decreases the value by inflation).
The miner gets $4 per transaction. This is very simple math. So if you are only paying 0.3p, someone else is paying.
But what is someone getting with a single transaction? If we look at
some random transaction that has just happened they paid much more than me, but they got a much bigger transaction with loads more inputs and they got it done much faster. We do not know how much it was, and I do not understand why some people pay so much but one has to assume it was worth them paying this much so we can assume they got appropriate value from it.
Counting these transactions as equivalent seems like counting an economy flight the same as a first class flight. You cannot divide up the fuel used on the plane so the person in first class person used 20 times the amount of fuel, but it make more sense to me for the first class passenger to be responsible for 20 times the environmental cost of the flight.
It comes down to the same question: What logic do you use for divvying up the environmental cost of the activity? Being poor and tight it may be a bit self serving to put it all down to money, but it seems to make more sense than anything else presented, certainly just counting transactions and considering them the same when people are obviously getting different value from them and the total cost of providing the service is so different.
This is complicated by the cost of visa being a simple proportion of the value charged, and monero being on bytes of transaction and how quickly you want it done, but if we are going to set up a system for assessing environmental cost it has to be one that incentivizes a lower footprint lifestyle. That does not involve giving visa 5% of all added value.
Then lets look at the total system:
Number of transactions made by VISA:
Nearly four out of 10 global card transactions in 2022 took place with a Visa-branded card.
www.statista.com
226 billion
VISA revenue:
Visa annual/quarterly revenue history and growth rate from 2010 to 2023. Revenue can be defined as the amount of money a company receives from its customers in exchange for the sales of goods or services. Revenue is the top line item on an income statement from which all costs and expenses are...
www.macrotrends.net
Visa annual revenue for 2021 was
$24.105B
total system cost:
$0.11 per transaction (if we assume that the whole point of Visa is making transactions)
total system cost for Monero:
$4 per transaction (if we assume that miners are not operating at a loss)
We know that most of the cost of Monero is in electricity and thus emits CO2. The executives of Visa do not have the money to fly enough private jets to emit enough CO2 that Monero comes out ahead in CO2 emitted per transaction
Why are you counting it by transactions? Why is that relevant? How will reducing the number of transactions reduce the carbon footprint? You acknowledge that doing the maths on the accounts is not what takes the CO2 in VISA. Reducing the money they get will reduce their carbon footprint.
Some more calculations:
Visa processes about 150 million transactions per day. If these were run through monero, with its consumption on the order of 300 kWh per transaction, then each year, it would consume 16,400 TWh. For comparison, the total UK power production for the year is only about 300 TWh.
The average UK household uses around 10 kWh per day. One monero transaction is something like a month's energy use for a household.
No matter how much we try to deflect with "but Visa's executives have big carbon footprints!", that cannot in any way counterbalance this. Monero is environmentally inexcusable. Sorry.
This is not comparing like with like. From your numbers of $24.105B/year and 150m/day that is an average of 44c/transaction. That is lots of really small transactions. A monero transaction that takes up a 24th of a block is a complex transaction. We do not know the sizes, but I can be fairly confident that all monero transactions average much more than $8 each.
Me choosing monero over visa is not going to cause everyone to suddenly change to using monero and the blockchain taking 16,400 TWh/year. It might get us a bit closer to a system of transferring value that does not transfer 1/20th of it from me to the financial industry. The environment would be better off is that was to happen.