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Sherpas play always a vital role while climbing in High Altitude (see the description of Sherpas below). But Sherpas increasingly understand their importance and this causes a lot of friction among climbers.
Rests of a Sherpa Walkout, 2013, 10 Signs, Paint, Tape, Paperboard and Bamboo
They called for a walkout one day to enforce higher wages and better working conditions. They initiated a brawl with three well know and experienced professional climbers high up on Everest because they felt aggrieved.
Also Sherpas will increasingly learn from other guides organizing the tour to Mount Everest. Soon they will be able to make their own offers, which will accelerate the commercialization on Everest.
What Sherpas are …
Sherpa (Tibetan for “eastern people“) are an ethnic group from the most mountainous region of Nepal. Most Sherpa people live in Nepal’s eastern regions. Today, the term is often used to refer to almost any guide or porter hired for mountaineering expeditions in the Himalayas, regardless of their ethnicity. Sherpas are renowned in the international climbing and mountaineering community for their hardiness, expertise, and experience at high altitude.
Very seldom they earn the merit for their work. Some Sherpas recently received more attention such as Apa Sherpa and Phurba Tashi Sherpa, for being 21 times on the summit by 2013, or Pem Dorjee Sherpa for the fastest ascend from Everest Base camp in 8 hours and 10 minutes in 2004.
Link: Sherpa in the Himalayas. For instance in Karakorum Balti people help.