Yes a staircase is a lot better than an escalator. They are healthier for people to use, and were actually intended for use by the disabled due to stairs being hard on some joints. I think it makes people very lazy and I try to use the stairs all the time. The link below is to one of my favorite pictures concerning stairs and escalators.
Escalators are not better than just using stairs, only a few instances warrant the use of an escalator such as within a metro. Otherwise, elevators would be sufficient for those who need to use them and everyone else can use stairs.
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