Asked whether paying cash in hand was "morally wrong", Labour leader Ed Miliband said ministers should be focusing on large-scale tax avoidance.
Speaking on a visit to Paris, Mr Miliband said: "What I say is that the job of government is to pass the right laws to clamp down on tax avoidance - that's the most important thing of all.
"What I will be saying to the Government is that they should be clamping down on the large-scale tax avoidance which has been revealed in the past few days and I think that's what people want to see from the Government."
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Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.