hayan enriquecido
Present perfect subjunctiveellos/ellas/ustedesconjugation ofenriquecer.

enriquecer

No porque se hayan enriquecido, sino porque el resto del mundo se ha ido empobreciendo progresivamente.
Not because they've grown richer, but because the rest of the world has grown increasingly poorer.
Sin embargo, tampoco se puede decir -y ello en su propio descargo- que el debate en la Comisión de Investigación y las numerosas enmiendas presentadas hayan enriquecido su reflexión y hayan venido a mejorarla.
However, it cannot be said either - and this exonerates you - that the debate in the research committee and the many amendments submitted have made your own thinking richer or have improved it.
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lean