I suppose there is nothing wrong with paying someone to teach you to fly. However, traditionally, your instructor was simply someone at the field who had the expertise to teach and a willingness to do so and often became a very good friend. He was usually someone whose personality complemented yours enough that the two of you could interact freely and with no issues. Introducing money into that equation would kind of put a damper on the friendship part, although it could be done I guess. It seems, though, that tradition is taking a back seat these days. Traditionally, presidential candidates did not engage in gross and personal attacks on another's family members, nor did they stoop to calling another candidate a liar or a cheat or ugly or fat. They had more class than that. So much for tradition, huh?