boost aggregate demand


Hi everybody and thanks in advance for your precious help.
I'm asking you sorry for my bad english!!!

I'm trying to translate the lyrics of a song treating about economy. It's a rap song interpreted by Keynes and Hayek.
(Here are the lyrics:

Here is the paragraph containing the phrase written in bold style that I can't translate:

" BOOM, 1929 the big crash" (...) " I had a " (...) " advice" (...): boost aggregate demand!"

I hope I respected your posting guidelines, thank you for your help.
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