"However subsidies generally ensure you lack the efficiency to compete."
Protective barriers were used in the 19th century to placate UK landowners who couldn't compete with cheaper imports from places like the prairies of North America.
That wasn't a government subsidy. Both the government and the landowners raked in the money from everyone else in the UK having to pay the higher prices.
The higher prices were particularly hard hitting on the working classes. Eventually that filtered through to the manufacturing industries having to raise wages and their own prices.
Those protectionist tariffs went with the repeal of the Corn Laws.