Emergency lap-dances?................
“Further, we found four travel vouchers for which government-issued travel cards were not used for expenses, as required.”
They probably used their own credit cards. Government credit cards take a while to be issued and become effective. Very likely, these people had not received their government cards in time for the trip, or had not known they had to apply for them.
Not an uncommon problem. I went through the transition to the “government credit card required”. Sounded good on paper for the government. In reality, more paperwork burden, more wasted time for the employees.
Most of the kinks were eventually worked out.