Are implying that this is the position of many people in this country?
If so YABU.... yes, of course there are people in this country that struggle with poverty, but if you are able to work full-time, life may be tough financially but to call it 'grinding, humiliating poverty' that justifies a life of crime is insulting to billions of poorer people in the world today and throughout history. You live in a country that provide a (rising) minimum wage, free healthcare, free primary/secondary education, the rule of law, a democratic and inclusive civil society, peaceful co-existence with our neighbouring countries, financial support for housing (I.e. Housing benefit) etc, etc.. Yes, things may not be as good as it could or should be, and there will doubtless be financial struggles, but if you work full-time in this country, you really can't think you're hard done by from a historical or global perspective.
If every person as poor or poorer than a full-time minimum wage UK worker around the world (i.e. 95%+ of the population) took this view (I.e. I'm poor so I might as well be a criminal) the world would descend into lawless anarchy, and things would be far, far worse for everyone.