Since we can track every crypto payment… if we paid taxes in crypto, could we see exactly what our taxes bought?

I've seen that on Cardano they hope to make it so that you could buy a coffee in Starbucks and then tip directly to the guy who picked the beans.

Well, if I paid my tax with an ada coin, could I then watch it move round the blockchain and see that it either ended up buying bricks for a hospital or cheese for an army soldier?

If so, that's pretty cool. We could literally vote what we wanted our taxes to go on.

Would a smart contract enable us to ensure our coins only went to roads and hospitals, and not to guns or dams or whatever?

If so, the future will be very interesting.