Pudding is no proof, eating pudding is

MM Online - Proof is in the pudding, Pakatan leaders say about ‘unsustainable ‘manifesto (extracts):

PETALING JAYA, March 23 — Pakatan Harapan (PH) leaders called today for a chance to win federal government to show that their manifesto works.

Batu MP and PKR vice president Chua Tian Chang said the current administration’s spending habits were unsustainable, in response to comments that PH’s election manifesto for the 14th general election would harm the economy.

“The proof will come if we are in power,” Chua told Malay Mail.

The saying is incorrect, about 'The proof is in the pudding'.

Where is the proof?

The correct saying is "The proof of the pudding is in the eating".

Yes, proof is in the eating, not just in the pudding. Isn't that basic logic?

As for Tian Chua boast in his “The proof will come if we are in power” I'd say that's an EMPTY boast.

By then (after the election), it'll be far too late to check Tian Chua's promise.

And that is further explained by:

isn't that too late? 

If it is just "The proof is in the pudding" then that's as good as saying "Wanna buy a pig in a poke" (poke being medieval English for bag or sack - saying derives from "Don't buy a pig in a poke" as explained by following image, wakakaka).