For me it's simply that a large % of landlords earned nothing; they inherited substantial property (or were gifted the means of acquiring it, such as by living

For me it's simply that a large % of landlords earned nothing; they inherited substantial property (or were gifted the means of acquiring it, such as by living rent free) and then tap the income streams of people who are productive, but whose labor is not worth enough for them ever to escape the drudgery. There is no level playing field in the UK.