That wouldn't necessarily be true. Congress could better, more clearly define what they require of these departments and services.
Most of them were pretty weakly defined and they were given legal precedent to define what their own authority was (unless specifically defined by Congress). The departments could be kept with more clear definitions of what they need to do and what success looks like.
That isn't clear yet from what I've seen. Destroying or knee capping departments is one thing rebuilding them as private or functionally private organizations is another level.
If they are planning to do this I don't think we've seen any direct signs of it yet, though I don't know how it could be anything other than fascism at that point.
Most of them were pretty weakly defined and they were given legal precedent to define what their own authority was (unless specifically defined by Congress). The departments could be kept with more clear definitions of what they need to do and what success looks like.