The obligation to pay the wages of a hired worker on time is one of the six hundred and thirteen commandments, as the verse says “On his day you must pay his wages!”. The Kabbalists have written that part of the achievement of fulfilling this commandment is that if one fulfils this commandment during the week he will merit on that Shabbos to additional life, spirit and soul. Since this is a very worthwhile consequence of this commandment it is correct for anyone who has been favored by Hashem with the financial ability to hire a worker during the week and pay him on time in order to fulfil this commandment.
Seeing that this is the case, how much more so is there an obligation on the members of the community to pay the wages of all those who work for the community on time. This includes cantors, caretakers and teachers.