Good point... however, you can only pay voluntary NI payments to fill gaps in your own contributions that cover the previous 6 years ... so I still don't know of an arbitrary way to throw money at government accountants. Other than literally... of course.
You must be eligible to pay voluntary National Insurance contributions for the time that the contributions cover.
You can usually only pay for gaps in your National Insurance record from the past 6 years.
You can sometimes pay for gaps from more than 6 years ago depending on your age."