Was Plan Z meant to exhaust Britain's economy?

Was Plan Z partly intended to strain Britain's economy by forcing it to outbuild Germany while still paying war debts?

No: Britain had the stronger maritime economy and established shipbuilding capacity, making expansion cheaper and easier than Germany's attempt to create the necessary infrastructure and compete for resources.

Raw industrial output did not capture the wider maritime economy that organized trade, skilled labor, and ship construction. Britain could expand from existing yards and personnel. Germany had to build more of the supporting capacity, and its navy competed with the army and Luftwaffe for priority. In Britain, the Royal Navy and Royal Air Force held the stronger claims on rearmament funds, undermining the idea that Plan Z could impose an asymmetric economic burden on the British.