I think the issue is the definition of 'breadline' now. I consider poverty to be having to choose between heating and eating, having to go without food to feed your children, that kind of thing. The amount of people living in that kind of poverty probably isn't that high. But the amount of people struggling with bills, rent, only just keeping their heads above water, getting by but miserably will be significantly higher.
Lifestyle expectations are different now, too. If I think about my early life with my husband to be in the early 90s, by today's standards we'd be practically church mice in our little flat with no central heating, no computer, 15 inch TV with a mere 4 channels, but it's all relative, isn't it?
Apart from the obvious fact that the rent at the time was bugger all (I lived there on my own initially at 18 on a very low factory worker's wage. I couldn't do that anywhere today), most of the people our age were in the same boat.
Life simply didn't cost as much. For me, the COL crisis isn't just about rents, increases in food and energy costs. It's how much more expensive modern living is in general. The internet went from non-existent to nice if you can afford it to absolutely necessary expenditure in a matter of a couple of decades. Ditto smartphones. All these costs we never had.
Poverty is both an absolute and a relative thing. Standards and expectations have increased. The number of people living below the modern expectation of a reasonable standard of living is significantly higher than it used to be because that standard is higher. We are swimming in a sea of tech that is becoming increasingly necessary to function as more and more services move to online platforms. We are now being charged more for paper bills, etc. All this is getting harder and harder to do without.
Statistics show those at the severe end. Poverty by anyone's definition, but they don't show the strain of those struggling to meet increasing requirements to meet an average modern standard - house, car, internet, smartphone, netflix, sky TV, annual holiday abroad.