DISPARITY ON STEEMIT

i have felt disparity on steemit, that is there are lot of upvotes even for cheap posts of western people but there is scarity of upvotes for asian people especially from under developed countries,
i ask why this disparity is prevailing on steemit? our well worked post does not gain even a single cent but users from western countries get hundreds of dollars even for a cheap post like saying good morning or good evening