Why do we have to use PayPal?

I often get requests from Members for different payment options. Membership subs and adverts are paid for via PayPal. I used to allow other options, but not any more. There are too many members now. To create additional payment facilities would considerably increase my admin time and force me to increase the subscription fees, which I don't want to do, partly because I run DepList single-handedly and there's a limit to the amount of time I can devote to it. The PayPal system is actually an integral part of my record-keeping system, allowing me to find out quickly who has paid and who  is due to pay etc. It also makes things much simpler for my accountant and my end-of-year tax return, if everything to do with DepList comes through PayPal.