. Since the inference here from the instructor lobby is (and before bob gets his panties in a bunch deconstructing my words am of course paraphrasing :andsummarising )
A) skiers are rich enough to pay extra, regardless of the base cost of the lesson
B) instructors are poorly paid so they are entitled to have their wages enhanced by the customer
C) instructors are a service worker and as such should expect to receive tips in the same way as a server (btw, not many servers,, or doctors for that matter! that I know spend their renumerated working hours skiing with their customer)
There is a very easy way to bring it to the attention of those who may not know about it and solve any embarrassment for the instructor about accepting cash
When the customer signs up for lessons, let's say for example $300 for a few group lessons, leave an open line on the credit card slip for tips for the instructor, with suggested amounts for tips of say 15, 20, 25% which would be $45, $60, $75 which seems to be in line with what is being suggested here. This let's clients know up front about it. For the customers who respond wtf? The ski school desk can provide the arguments I have provided above and/ or point out that while the cost is for the lesson it only covers overheads, not the instructors wages.....
Let's see then how many clients a) add something b) cancel the lesson or c) put a zero in the tip line. I have my suspicions about the results but this makes it easy. Heck, for group lessons since it is parties of 6 or more let's add a compulsory 18% service charge AND leave the line open for a tip as well!
Oh and one other thing being missed by all the accusations of "tightwad " being thrown about. You realize of course that for a Scotsman to be called that we take it as a compliment !