there's no real perfection among analogies. i emphasize that like a business, but rather unlike employed individuals or fixed income 'earners', the government can associate investment with its objectives, rather than just time alone.
as to your point about the government being unable to affect the creation of wealth: public consumption can certainly allow contractors to realize profits. public jobs can allow employees to convert their time to wealth. luckily, man, all money is green.
the propensities of the economy to create wealth are facilitated by the government's issuance in the first place. barter will not suffice.
with respect to tax policy, our tax code is designed to specifically target monies not participating in the economy, and government spending specifically puts those dollars back into the part of the economy where wealth is created. there is a sweet-spot in the economy, where the most valuable economic activity with respect to wealth creation -- commerce -- is most pervasive. tax and spend redirects money into this area, and more wealth is created by that virtue. the US is a consumer economy, by far. some ideas are more fitting with industrial/agrarian economies.
this libertarian-derived mythology regarding the government's inability to create wealth or facilitate that creation does not consider this sweet spot. where its progenitor may have seen the microeconomic bases to his macroeconomic thesis in pre-war europe, i say the tenets of this aspect of it fall like ducks to a 10-guage when put through their paces in modern america:
where its argued that taxation and expenditure by government is wasteful and precludes the creation of wealth, i say that the expenditure of government, waste (like paying too much for facilities and supplies) included, is more effectively targeted at the part of the economy where wealth is created than it would have been had the tax not been collected at all.
exploring that..
where it is argued that taxation of businesses which have monies earmarked for stimulative investments curtails these productive pursuits, i say, in america, if you make said investments, the expenses are deductible. shoulda,
woulda, coulda made them within the fiscal year. i say this mechanism motivates investment among businesses and charitability among individuals more than an entire absence of any taxes, whatsoever, would affect.
where it is argued that private citizens with expendable income and savings more effectively stimulate the economy with their spending, i argue that the government makes specific consideration to parts of the economy which are hurting, like the housing and rental markets in cities with 15%+ unemployement as many cities right now are experiencing, and spends in ways no private citizen will: like paying unemployment for 99 weeks to those who can substantiate they are making a jobsearch effort. who the f is the private citizen angel who has the wherewithal or intention to do that?

rents get paid. mortgages get paid. goods continue to flow, albeit slower, and producers and service providers can hang on to their employs as a result.

:wealth creation.
then there's the dead horse ive been beating about timing and the converse character of expansions and contractions. part of that indicates the government being one of the only to put out in desperate times, while at the height of the economic cycle, private citizens and businesses are spending drunk. the government will spend. it is crucial that it not spend drunk with the rest of us near the summit. it is crucial that is supplant the scarcity of expenditure in the trough, when everyone else seems to do the belt-tightening act.
time is not on my side. i'll get to your contention that the spending is too much, and the spare the rod, spoil the child in the recession some time later.
