I would check with a lawyer in your jurisdiction before assuming that non-payment voids the contract. See, for example, the judgement in this UK case:
> Finally, although the First Assignment records both that Mr Dichand and Dr Spaziante were to receive one US dollar as consideration for the assignment of the PCT Applications and further records that they both acknowledged receipt of the dollar, it was never paid by HTI. Mr Edenborough argued that as a consequence the contract was void for lack of consideration. I think the consequence is that Mr Dichand and Dr Spaziante may or may not have a claim against HTI for an outstanding debt of 50 cents each.
Slightly pedantically - England and Wales. Scots law doesn't require consideration.
I'd certainly check with a lawyer though - it's been a long time since I studied it ( English law), but my understanding is that not paying is a breach of contract, and it doesn't necessarily make it void for lack of consideration.
> Finally, although the First Assignment records both that Mr Dichand and Dr Spaziante were to receive one US dollar as consideration for the assignment of the PCT Applications and further records that they both acknowledged receipt of the dollar, it was never paid by HTI. Mr Edenborough argued that as a consequence the contract was void for lack of consideration. I think the consequence is that Mr Dichand and Dr Spaziante may or may not have a claim against HTI for an outstanding debt of 50 cents each.
http://www.bailii.org/ew/cases/EWHC/IPEC/2018/1142.html