Comment Re:How can you know "earnings" from eBay? (Score 1) 190
In the USA, the IRS is going to require credit card processors to report what they pay businesses. It's very easy to spot a business that doesn't report or under reports their cash transactions. It was easy to cheat on but when the average business in the sector makes 20% of their revenue from cash and a 5% profit on their revenue they stand out like a sore thumb if they get greedy.
I'd imagine that the British are doing the same thing. They are just looking for people that fall outside the a standard deviation or two for whatever sector they are in.