The consumption habits of very rich and very poor are similar but for very different reasons. Very rich do it out of choice and paying a lot for it whereas very poor do it out of compulsion/non affordability Both consume - cotton clothes - high fibre, low fat diet - raw seasonable vegetables/fruits - low processed food - non branded items - drink lots of water Both also do a lot of things similarly - walk/cycle - expose to sunlight - socialise - sleep well - spend time with family - get pleasure from small things - like variety in life I am sure there are loads of others that you may have to share.
Moving on from the core theme of only consumers to a broader Indian complexity. An amazing country that can be challenging to understand due to its diversity - economically, socially, linguistically, racially and what not. Enjoy the THALI as they say....