I will ignore emails in real life when I am busy, so I use that excuse for my people too and they go right on ignoring email until they get that promotion. If you don't shut down or switch families between getting the email and answering, the emails just pile up. I had one of my mothers move to master just after making level 6 because 2 of the 4 emails waiting to be answered were instant promotions.
My peeps are more upset about accusations of job infringement than that of paying taxes, which eventually gets paid back to them.
Once my peeps receive a promotion of any sort, incoming emails goes unanswered - temporarily..... Meaning, I too switch between families. It's a procedure my peeps learned early on and will continue to hand down for generations to come.
