If the government feeds on money, the IRS is its jaws. Assuming no change in the tax code, smaller government would require less money and require less of an IRS to get the job done. The smaller the federal government, the less bite the IRS would have. As an example, if you pay state income tax then ask yourself if you're more concerned about the Federal IRS or your state and local revenue tax collectors. If you get taxed a dollar for a government program for the homeless, they get about a quarter.
Liberals seem to think the former is greedy while the latter is compassionate.
Smaller federal government that left local problems to local authorities would allow more of that tax money to make it to those who need it, rather than to an extra layer or three of bureaucrats. It would also let you keep more of your own money for you to be compassionate with. True compassion comes from people , who give of themselves when they give money they've earned themselves, not governments , who give only what they can take from those who earned it. A government that has less to work with is far less likely to waste taxpayer money on pet projects when passing unrelated legislation. A leaner government would produce leaner bills.