We had an extra gift for her-pink headphones.

我们为她准备了一份额外的礼物——粉红色耳机。

I'll get him an extra gift bag.

我要多给他一个礼品袋。

Or, if you have done a particularly good job you might get this as an extra gift.

或者，如果您做得特别好， 您可能会得到一份额外的礼物。

So unintended consequences are that the local governments have begun to cheat, which is to say that the local government will throw in an extra gift.

那么意想不到的后果就是地方政府开始作弊，也就是说地方政府会额外多送一份礼物。