why can't the voting machine print a receipt with a unique random number for each instance? why can't every voter get an alphanumeric-ID that has nothing to do

why can't the voting machine print a receipt with a unique random number for each instance? why can't every voter get an alphanumeric-ID that has nothing to do with his last/first names? This way the whole voting record can be listed publicly, searched and verified by all those who voted just like a lottery ticket to some extent. Technically there are so many ways to double-check the election correctness but none is implemented, why? just a dumb machine that my input is going to /dev/null without any way to check the return/error code?