Please don't tar all amped buskers/panpipers with the same brush!
I play panpipes - own make - and have a small (15 watt)amp for backing tracks which I keep turned down as low as I can to avoid disturbing shopkeepers and other buskers. I have played all over Britain and the Continent.
A lot of my repertoire is classical music, which is not solo; I mean, even Pavarotti needed backing!
I use a variety of backings: orchestra, church organ, midi, and myself on guitar for pieces like Ave Maria (Bach/Gounod)and Cavatina ("Deer Hunter"). I also play weddings etc.
I too have my work cut out avoiding the mostly too loud-amped, M.O.R. South Americans.
I also sometimes get out my guitar, and do classical/beatles/cohen/drake/taylor/simon/gershwin/jobim/zep covers
etc.
There are one or two other "solo" panpipers, like Andreas Gmelin, who is a genius (and also uses backing!)