Who can afford that! Blimey!
Why do you think the Child Tax Credits are so high!

and your quoted statement about it doesn't cost 21k a month to run a Nursery, hmm, my wage bill alone at the minute is ~£42K a month

Then you have all the other usual costs, utilities (massive! the place is open 10 hrs a day with constant Laundry/Commercial Kitchen/Heating etc), insurances, rents, office costs etc etc
Then you have to buy resources, holy cow, these companies know how to charge because it a 'child rated' Nursery item....the prices would make your eyes water.