a costa de

at the expense of

→ a
phrase Rare #40,832
at the expense of Used when one thing is achieved by harming, sacrificing, or losing something else.
SP: Ganó la carrera a costa de mucho esfuerzo.
EN: He won the race at the expense of a lot of effort.

La gente por lo general se vuelve famosa a costa de su privacidad.

People usually become famous at the expense of their privacy.

Un programa económico como ese va a ayudar a los ricos a costa de los pobres.

An economic program like that will help the rich at the expense of the poor.

La broma fue a costa de Tom.

The joke was at Tom's expense.

Pero no a costa de nuestra causa.

But not at the expense of our cause.