I see this as a gross invasion of privacy, and also as a means of further humiliating those on benefits. There are many things that could be done to make things fairer - eg tightening up on loopholes that allow couples to claim two lots of tax allowance when only one is paying tax, and generally prosecuting more tax evasion and fraud.
I suppose the devil is in the detail, too. If the checks are 'just' to see if there are other income sources going into accounts it is one thing, but are claimants going to be asked why they bought from Waitrose instead of Aldi, or whether they could cut back on TV subscriptions? If that is the case my annoyance at this will turn immediately to disgust.
My grandparents were born in 1908, and lived through the Depression. I remember my grandfather saying that the means test in those days involved someone coming to the house and looking round at what could be sold. If you had anything at all of value it had to be sold before you could claim assistance (this was before the Welfare State). If you were on the margins of poverty there was no point in trying to 'better yourself' as anything you had could be taken from you when times were hard. He had tears in his eyes when he told me about his piano, which he had to sell to keep the wolf from the door. Others lost winter coats, books, anything that wasn't immediately necessary for basic survival.
Naturally, this caused bad feeling between neighbours, who saw people hiding treasured possessions from the public assistance people, and resented it when they lost their own things. 'Snitching' was rife then, too. Divide and rule has always been used to keep people at the bottom of the pile.
Do we really want to go back to those dehumanising practices? Yes, there will be some who play the system. Some will be proud of it, and others just desperate. But let's not allow the system of giving help to the poor to disintegrate altogether, and for heaven's sake let's not make people have to justify every penny they spend. As King Lear says 'Allow not Nature more than Nature needs, man's life's as cheap as beasts'.'