This is not the 1970s. HMRC take tax evasion of any form extremely seriously and use the law courts to their full in order to criminalise those who break the law.
Even where legal action is not followed through, the penalty regime is painful and there is still the tax and interest to pay.
The fact is that any business not taking its tax responsibilities seriously is heading for a fall…so, no, they don’t all do it these days!
A good, well-run business is tax compliant because it can’t afford to be anything less.