The phrase "escalating consequences" means that the negative outcome or punishment for a certain action becomes more severe or intense as the action is repeated or worsens. Full definition
We don't use escalating consequences; instead we look for ways for children to want to be part of the system and to want to please us. (parentingbeyondpunishment.com)
Schools deemed to be failing face escalating consequences. (huffingtonpost.com)
From dramatically escalating consequences — and dishing the details to anyone who'll listen — to «calling out» troubling behavior on Facebook and Instagram, publicly shaming kids can seem effective at first. (thespruce.com)