The simplest measure of the size of federal government is the budget. Spending has grown wonderfully since 1980, so frankly if their objective is to “shrink government” they’ve done a horrible job.
https://tradingeconomics.com/united-states/government-spendi...
EDIT: misread chart, made false claim above. 1980 was a few percentage points of GDP below 2019 spending. Sorry for the false claim.
(imagine say, the internet, etc)
In my defense, I think it still shows something quite different from what the OP was claiming. But I was even more clearly wrong.