Think about how all that waste trickles down into wasted business hours, wasted time that could be spent doing something productive. Never mind all of the wasted tax dollars, that's just the tip of the iceberg.
20% fewer meddling bureaucrats, with 10% less budget to work with will have a massive impact on the US. Talk about turbocharging the engine....
I'm not talking about the business benefits of 20% fewer unneeded Federal Government Employees. Since you brought it up however, even with the effects of "turbo-charging" the economy as a result, that in and of itself will not generate sufficient enough "revenue" (read that: TAX DOLLARS) to even begin digging us out of the hole that Obama made twice as deep during his eight year reign of terror.
We're $20,000,000,000,000 (TRILLION) dollars in debt, interest rates are rising and again, the really BIG money is spent on non-discretionary programs like Social Security, Medicare, Medicaid, etc..
What Trump is doing vis a vis cutting federal bureaucrats and minimum 10% cut in spending across the board is an excellent start --- however it's just that: A START. Every federal program whether discretionary or non-discretionary needs to be CUT for us to start digging our way out of this debt hole we're in.
To NOT address non-discretionary spending is to simply continue kicking the proverbial can down the road.