What happens if a subcontractor doesn't bother to try to collect payment for a job he did?

The contractor either mails you a check or you don't get paid. If you're ignoring him when he asks to meet up to pay you, then you won't be getting any more work from that contractor. There's no way you're actually a subcontractor though. If you were, you would know that if you don't get paid, then you not only worked for free, supplied materials out of your pocket but you also can't pay your bills.

if you don’t want to get paid you can come over and rewire my kitchen remodel

they may send you a check for the job, they SHOULD send you a check since you have a contract but I don’t understand why you would ignore them trying to contact you

they need to pay you and have you sign a document that you have no claims (liens) in regards to the general contractor or the project/property owners , in many states this is required in order for the general contractor to be paid