I am a SAHM and no-one pays me to do chores so the children have never been paid either.
From 4 and in school they were responsible for taking their plastic plate and plastic cup from the table into the kitchen, helped scrape the plate and put it into the dishwasher. This is what they do at school, they are responsible for their lunch tray (minus the dishwasher bit) a dinner person doesn't do it for them like some pampered prince.
Then it progressed to wiping out the bathroom sink after they have used it, stripping beds, putting bedding back on.
They are now almost 16 and 13. Both boys, they set the table, help make dinner, clear the table at the end and wipe it down. They have to stay in the kitchen with me and DH helping until all dinner stuff has been dealt with like hand washing pans.
They also empty a bin each on a set day (never a full bin in this house) and put the bin out for the bin truck on their way to school. Doesn't matter if it is raining as they are heading out the door anyway.
They also help unpack shopping and put it away. It is called learning to be an adult.
Their "reward" for their helpfulness is they get to game/watch YouTube/TV because you do not reward bad behaviour.
Your son doesn't need the money hence why he can choose not to do the chores you set, but by God I bet he would if you removed his x-box. You pay for the electricity probably his phone so cut him off.