Raaga

Ate there today for lunch. Nice $12 buffet. Used a Groupon coupon and they charged a 20% gratuity - obligatory, they said. Wine very expensive by the glass. Comparable Trader Joe's would be 5 oz glass at about 65 cents even with tax!  (5 glasses in a $3 bottle) Why don't restaurants simply offer this affordable wine at near cost and charge more for the food they prepare as opposed to unpack?