is this spoken from experience or assumption? Your examples sound like you are assuming that money sent to companies is sent like a check, and no further action is taken.

I cannot claim authority over all instances of gov funding, but I have managed funds from the government for Rd use and they absolutely do audit, and they absolutely do require an accounting down to the last penny, and they absolutely do review plans vs actions. And they absolutely do get refunds for money not spent. And, critically, they absolutely do shutdown follow on funding if they do not like what they see.