Spanish: Músico Pagado Toca Mal Son.
Literal Meaning: A musician who has been paid plays a bad son (genre of music).
Meaning: People paid in advance rarely do a good job.
Lalo tiene un salario de MN 5,000 al mes, mientras a Juanis le pagan por comisión sobre lo que vende. No me sorprende que trabaja más Juanis. Músico pagado toca mal son. (Lalo is paid a monthly salary of 5,000 pesos, while Juanis is paid a commission on her sales. I’m not surprised that Juanis works harder. A musician paid in advance rarely plays a good tune.)