Yup go full digital, including mama mboga and matatus, and tools like AI. The US IRS sniffs out 99% of defaulters using big data. Say if you get a salary, stock dividend, rental income, gift from diaspora sibling, etc. With AI all your details are known and summarized by the taxman pronto. No where to hide unless you go Cayman which only a few fat cats will do.
KRA I think needs tech help from likes of UK. No need to be proud, they can get quick returns if they go outside the box. It's a low hanging fruit GoK should squeeze KRA hard to implement. Njiraini is just lazy and praised for nothing. We have no trade secrets here... it's up and up.