They must fuel their good intentions with something, I suppose. Still, it is quite rude to leave the clean up to the birthday person.

[Gladio told him later that was the main reason they had the party at the Citadel. There was no way they were going to let Ignis clean up after his own surprise birthday party and they knew he would try if he was at any of their apartments.]

The best of intentions are not always the best thought out of intentions. I guess that is why the phrase 'It's the thought that counts' is so popular.