That was the famous quote by The Scotsman in "Dad's Army".
Just have a read of this article by Ross Gittins in the SMH:
"The four most disproportionately influential industries in Australia,
they say, are superannuation, banking, mining and gambling."
Note that in my view, these are all useless to the common citizen: I for one still strongly suspect that my super money will magically disappear before I get to collect whatever pittance is left after the administration fees because they are are playing with my super money on the giant casino called "The stock market".
Then there is the news that the Super percentage is to be increased, which will place additional pressures on employers and drive more small operators out of business, but who cares, right?
I don't even need to say anything about the banks.
Mining giants are working hard to get rid of employees by bringing in computer operated machinery, but then they never employed that many people anyway: they have those huge machines for good reason - employees are costly and troublesome, don't you know?
Gambling? An "industry"? Not in my definition: I thought an industry produced something useful for it's customers. It needs a new definition, something like "parasitic business that slowly kills the host".
So in short, none of these operations does anything much for the good of the nation or (perish the thought) the citizens (or "consumers" as they are now called), but they have a disproportionate influence on government . . . . . .
Oh, that's right, that's called "corruption".