I take it your not 10 so you are fully aware that food has increase in price a lot over the past 5 years? As me and you get older and we still live at home we tend to eat more, bring round our pals and raid the fridge and the cupboards for food, then we buy a PC and spend hours and hours sitting on it, it may of been easier for me to understand as my parents didn't have sky or dial up internet as it was at the time, broadband was too new so my parents simply said if I wanted it I would have to buy it myself which I thought was fair, I didnt pay a lot maybe £100 a month but I paid my sky bill and my phone bill.
Food going up in price over time isn't the same as constantly increasing bills. It also depends on where you shop and how you shop. If you shop irresponsibly, then maybe so, if you don't then no the cost isn't going up much at all.
You also seem to be twisting things from "Pay up or get out is selfish" to "you're making them pay for everything for you". You're making stuff up that no one has said, then arguing against that and suggesting people have said that. Pack it in.