The authority insisted that tickets are being paid for out of rent income, not council tax.

For decades, rent income was in the low-single-figure millions.

Landlords can deduct mortgage interest and the cost of repairs from taxable rent income.

The estates were often (but not always) made up of tenanted farms, in which case the gentleman could live entirely off rent income.

Thus, the relative proportions of industry profits, interest, and rent income in total surplus value have a decisive effect on the ability of the economy to grow.