No that’s not the theory. The theory is when you get paid all your money is converted into bitcoin on strike or you get paid directly in bitcoin. When you pay all of your expenses on your credit card (rent, phone, utilities, food, etc) you’ll get the 1-4% cash back from your credit card while also your expense money is in bitcoin that is growing (most cases) and when it’s time to pay off your credit card bill you are using the Bitcoin.
So you could earn cash back from credit cards and you bitcoin could have grown 5-10% in a months time as well so you end up net positive on both sides with the cash back / points and bitcoin appreciating. Even at the end of the year when taxing are due you pay capital gains taxes on the profit which sucks of course but you are still net green on the year and this is just simply living on a bitcoin standard. You won’t necessarily have to get paid in fiat then end up buying bitcoin on strike or whatever and paying off bills each month with little growth potential besides / unless you are using a credit card and getting cash back