Theft at the supermarket

Today I opened my new circular from Waldbaum's and I notice that the Bumble Bee tuna was priced at $1.25 a can. Not much more you might think until you see the small print and notice that the tuna can's weight is now only 5 ounces. That is one ounce less that it was until real recently. A few months ago I bought some cans for 99 cents and they were 6 ounces. Just before this I also noticed that the Scott's toilet paper said "still 1000 sheets per roll". Yep, that part is true but I had noticed that the rolls were smaller and I had some older rolls around that said it was 125 square feet per roll and the new ones NOW said 115.2 square feet per roll. The price goes up and the size gets smaller in both cases. I think that is a double theft. A year or two ago the yogurts went from 8 oz to 6 oz. and they did it under the guise of portion control. The price dropped at first but then went up. In both cases the serving size was one in each container. So they lied about doing for portion control. Next, have you noticed that there are lots more sizes in everything ranging from cereal box sizes and weights to potato chips. The supermarket plays along by not being consistent in how they price them. Some will say 40 cents per ounce and others will give the price per pound or in ounces and then pints or quarts.
I know that they don't want to look to be solely blame for the prices going up but they are helping add to the confusion. I guess it should be called collusion.
I am tired of the deception and outright lies. The stores and producers should be honest and the weights and sizes should be transparent as, I believe, the laws on supermarket price displaying was intended to be.