I don't know of any ATM machines with touch screens though there may be some. Haven't used a touch screen in a long time though years ago there were some at work. They worked fine but sometimes they wouldn't register especially if you were quick, in time they got glitcher until we got rid of them. Maybe the technology hasn't improved. Also most governments do not usually get the best equipment.
Here's one reason: to prevent your union shop steward or anybody else making you hand it in, to make sure you voted (and voted "correctly")