There is no need for distraction. As I said upthread, benefits fraud and tax evasion are investigated by totally different agencies. By no means all benefit fraud is committed by desperate people on the breadline, much is committed by people who simply don’t want to work, and your cash in hand window cleaner or gardener is quite likely to be failing to declare all their earnings - it’s not only the wealthy who indulge in tax evasion. (I don’t pay anyone in cash.)
You don’t need ‘expensive’ lawyers or accountants to take advantage of such tax avoidance schemes are available to you, such as saving money in a pension or ISA or inheritance tax planning through legitimate lifetime gifts, or maybe a trust. Nor do you have to be wealthy. When making a will, as we all should, a solicitor will give appropriate advice.