You spin up agents and want them to paid without opening a bank account... or spin-up hundreds of agents... or your country isn't very well integrated with western banking rails. I think there is more to consider.

You don’t need to open a bank account to get a prepaid debit card.

This is highly country dependent. Anonymous prepaid cards aren't as widely available as you might think, and often they have very high user-paid fees.

Which reloadable debit cards have no KYC requirements?

The amount of money you can load or receive into a debit card is limited without doing enough KYC overhead you could have gotten a bank account with the same effort.

If you try automating bots to do KYC for debit cards what you'll be doing is basically looking like a money launderer and get all your accounts shut down.