The U.S. has spent USD 0.5TN in interests only in 2022, if you think that 75bn is too much better start checking the budget because you have no idea where money is spent and at what level. Aid to Ukraine is just an investment to “not” have the o go boots-on-ground if the baby fürer putin decides to invade a NATO member.
EDIT: Also forgot to mention that we haven’t just cut a $75bn check for UA. We have given systems that were manufactured in the US meaning that the money just stayed here.