This is where lies the heart of my disagreement. Martial arts and business do not mix well. No martial arts school should be run as a business on which the instructor's livlihood depends. It can be run as a side business with the financial goal of covering expenses, perhaps a small profit on top, but that should really be the end of it. When the business is the bread and butter and livlihood for the instructor, it is guaranteed to become a problem. I do not believe a martial arts school should be run in this way.
I want to clarify my position a bit.
It is my opinion that when one's livlihood is on the line, one will make decisions that favor finances over quality and integrity. Running a martial arts school as a business and primary source of income, is guaranteed to bring this up sooner or later.
The instructor may open the school and begin with all the best intentions. He may even be teaching to a high level of quality for a time. But sooner or later he will be faced with a decision that he needs to make in order to prevent the school failing and his income disappearing. Probably this decision, while saving his school in the short term, will mean that he has compromised his standards. And once he makes that decision once, he has stepped onto a slippery slope and it will happen again and again.
Picture this: John opens a school part time, and keeps his day job. He teaches to a high level of quality, and his school grows. Eventually he quits his day job and runs the school full time. He makes a fair income from the business. As his student body grows, he can no longer keep up with all the teaching. He no longer has the close relationship with every student, that he once had because he needs to rely on assistants to run many of the classes. He's already lost control of the quality at this point.
Then, the economy takes a dump and he starts losing students who no longer have the disposable income to pay for karate lessons, which are perceived by most people as a luxury, recreational activity. John begins to realize that his livlihood is in danger. He can't afford to lose any more students, or else he will start missing payments on his expenses. If he misses another mortgage payment, he may lose his home.
Jenny has been a student of John's for a few years. She's a regular in class, but she doesn't train very hard and doesn't really spend much time outside class practicing. She also doesn't have a lot of natural ability with which to make up for her lack of committment to training. But she shows up to class regularly because it's sort of a social thing for her, and she happily pays her dues every month and buys a new gi and sparring gear and school tee-shirts from him once a year or so.
Jenny hasn't been promoted in a while, and she has been seeing a lot of other people get promoted around her. She is getting disgruntled. John realizes he may lose her if she doesn't get another belt, and he can't lose another student right now. Gotta pay the mortgage.
So Jenny gets to test, doesn't do very well, but gets the belt anyway. Gotta keep Jenny from leaving. John just made a decision to compromise his standards, drop the bar to a new low, and gave away a belt.
There is no going back from that. Once that standard has been set, all the other students expect it for themselves. You cannot take the rank away from the student and tell them, "I never should have promoted you yet, you didn't deserve it, so give back the belt." Once it's done, you cannot undo it.
And it's all downhill from there.
keep a day job. Teach on the side, and don't let yourself get into a position where you need to say "yes" to a student when it's not merited. If you are afraid of losing students for financial reasons, you are in a bad situation and you have lost control of quality.
I do not necessarily believe that the instructor is deliberately misleading anyone. I think most of them probably start out with the best of intentions. But I do believe that the reality of running a business and earning an income will eventually force him to make decisions that are good for business and bad for quality.