'I deserve ...' is similar.
I've lost track of the number of times that I've heard this expression used to justify some expenditure that in reality the speaker can't afford, as in, "I work really hard so I deserve the holiday that I have just booked (even though I am already behind with payments for rent, energy, Netflixs etc.)!
Girls grammars in the 60s (and beyond)
Favourite small treat when feeling blue or conversely a bit flush



project