DeMo failed partially as Banks didn't support it. If u have seen the news some bank staff and managers were allegedly involved in exchanging notes.
GST is good, prices came down. A Sony 43 inch LED Tv before June 17 costed 60k, and after June 17 it came down to 55k.
GST also introduced ITC benefit which was absent in previous tax system so there is no tax in tax
I can give u many instances. Restaurant tax was 15% now its 5%. Prices have not been reduced that much as hoteliers have hiked their base price. I had got a Car battery in 2014 for Rs 3500 and last month I got a new one for Rs 3000. So many live examples I can give u.
I can't expect everything on earth to be cheap we are not living in a fantasy land