Movie Logic - Wait, How's That A Happy Ending? Spoilers!

So, I was watching The Sons of Katie Elder , a John Wayne/Dean Martin Western from 1965. It's pretty entertaining, even if there are plot points and individual scenes that don't make much sense. However, the ending is a great example of movie logic.

The film follows four brothers who return home for their Mom's funeral in late-19th century Texas. They clash with the local businessman who stole their family ranch, then murdered their father. Eventually, the bad guys are dead, as well as the least interesting of the brothers (Earl Holliman). However, the ending gives the impression that everything is going to be fine for the remaining brothers. Not so fast, Hollywood.

Did you think we would forget that Dean Martin is wanted for murder? Or that John Wayne went and killed the chief villain, even though local law enforcement told him not to? Even in 1880s Texas, I assume that would be considered manslaughter. And we still don't know how the Wayne and Martin are supposed to pay for youngest brother Bud's (Michael Anderson, Jr.) school, since it was Mom's dream he go to college. What about the horses they had picked up on credit to sell that are now wandering all over the ass-end of Texas? Hey, given the state of medical technology in Ciudad El Remoto...or whatever the town they are in is named...how confident are we that Martin's and Anderson's injuries aren't going to leave them permanently crippled? Will John Wayne wind up changing Dean Martin's bedpans?

But, hey, the bad guy is blown up, the dead brother is forgotten and John Wayne is probably going to bang sassy boarding-house owner Martha Hyer. Happy Endings for all!