If they want takeaways, that isn't ordinary meals, you pay for it yourself, like the rest of us have to do.
It isn't because they WANT a takeaway. You are entirely misunderstanding this. It is "ordinary meals" it is completely normal in the civil service and the private sector for the company to order food for the staff who are doing unpaid overtime into the evening past dinner time.
This isn't individual people thinking "I really fancy a chinese today better get the government to pay for it", it is a single order for the entire department while all the staff are forced to stay there though the night and work on the pandemic response.
You said "pay for it themselves like the rest of us do" but every office job I've ever had ordered in food after about 8 o'clock when you had to stay and finish a project, they usually provide a taxi home after a certain time too.
This isn't out of the ordinary and even more reasonable during the pandemic for the staff that
had to go into the office.
If you have not experienced this maybe it sounds out of the ordinary to you but this is a completely normal thing in the corporate world.
I really hate tory corruption but this really doesn't seem to be that. Sure if this was a single dinner for 6 people it is outrageous, but it is hundreds of meals during March & April lockdown.