[文法] than that/what子句？

[dormg (...)]

請問一下，我看到雜誌上有一個句子：

The promised target is no different than that alredy passed by the House of
                                         ↑↑
Representatives, and considerably lower than what other rich countries have

promied.

請問，箭頭處的that，在我的文法觀念中，不是應該用what嗎？

也就是必須用what去引導「省略（子句本身）前方名詞」的後接名詞子句，
才是合乎文法？

因此雜誌上的上述句子到底是算寫錯或印錯（排版上這不是不可能），
還是另有文法上的答案解釋？懇請高手分析指點...謝謝啊....

PS：況且在句子下一行，類似句子就用 than what...了。所以我才搞迷糊了。
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◆ From: 140.112.231.75
※ 編輯: dormg           來自: 140.112.231.75       (07/10 14:20)
→ n3oanderson:`that' denotes `The promised target.'
→ usread:no,"that"  denotes what was acutally passed by Congress
→ usread:注意句中的passed 是過去分詞被動式
→ usread:若改用what,得寫what was passed by或用主動what passed in
→ dormg:thanks a lot.
→ n3oanderson:usread is correct.