They resent the implication that they have behaved irresponsibly.

他们对那种暗示他们的行为不负责任的言论非常不满。

《柯林斯英汉双解大词典》

Was this yet another case of people irresponsibly leaving things until the last minute?

这又是一个不负责任的把事情丢掉生命的最后一刻的事情吗？

youdao

Congress acted irresponsibly when it failed to extend the FAA authorization before its expiration.

FORBES: Congressional Waste: The FAA and Airlines Taxes

And maybe that is just his point: the rich should have less because they spend irresponsibly.

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You could be concerned about leaving them a lump sum gift because they might use it irresponsibly.

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