Real government spending can be higher if the government can raise more tax revenue by increasing tax rates.
Answer: True
The answer is True.
The question was tempting the reader to follow a logic such that - Modern Monetary Theory (MMT) shows that taxpayers do fund anything and sovereign governments are never revenue-constrained because they are the monopoly issuers of the currency in use. Therefore, the government can spend whatever it likes irrespective of the level of taxation. Therefore the answer is false.
But, that logic while correct for the most part ignores the underlying role of taxation.
A full appreciation of the subtlety of the question requires an understanding of the role that taxation plays in a fiat monetary system.
Note we are talking about real government spending being higher which means we are assuming that nominal public spending growth is not just feeding inflation.
One might argue that the answer is conditional on the state of utilisation of productive capacity. So that if there is idle capacity, the economy can respond to increased nominal spending in real terms - that is, by increasing production of goods and services without there being any need for the government to reduce private spending capacity via increased tax revenue.
While that is true, it doesn't negate the validity of the answer provided here.
In a fiat monetary system the currency has no intrinsic worth. Further the government has no intrinsic financial constraint. Once we realise that government spending is not revenue-constrained then we have to analyse the functions of taxation in a different light. The starting point of this new understanding is that taxation functions to promote offers from private individuals to government of goods and services in return for the necessary funds to extinguish the tax liabilities.
In this way, it is clear that the imposition of taxes creates unemployment (people seeking paid work) in the non-government sector and allows a transfer of real goods and services from the non-government to the government sector, which in turn, facilitates the government's economic and social program.
The crucial point is that the funds necessary to pay the tax liabilities are provided to the non-government sector by government spending. Accordingly, government spending provides the paid work which eliminates the unemployment created by the taxes.
This train of logic also explains why mass unemployment arises. It is the introduction of State Money (government taxing and spending) into a non-monetary economics that raises the spectre of involuntary unemployment. For aggregate output to be sold, total spending must equal total income (whether actual income generated in production is fully spent or not each period). Involuntary unemployment is idle labour offered for sale with no buyers at current prices (wages).
Unemployment occurs when the private sector, in aggregate, desires to earn the monetary unit of account, but doesn't desire to spend all it earns, other things equal. As a result, involuntary inventory accumulation among sellers of goods and services translates into decreased output and employment. In this situation, nominal (or real) wage cuts per se do not clear the labour market, unless those cuts somehow eliminate the private sector desire to net save, and thereby increase spending.
The purpose of State Money is for the government to move real resources from private to public domain. It does so by first levying a tax, which creates a notional demand for its currency of issue. To obtain funds needed to pay taxes and net save, non-government agents offer real goods and services for sale in exchange for the needed units of the currency. This includes, of-course, the offer of labour by the unemployed. The obvious conclusion is that unemployment occurs when net government spending is too low to accommodate the need to pay taxes and the desire to net save.
This analysis also sets the limits on government spending. It is clear that government spending has to be sufficient to allow taxes to be paid.
In addition, net government spending is required to meet the private desire to save (accumulate net financial assets). From the previous paragraph it is also clear that if the Government doesn't spend enough to cover taxes and desire to save the manifestation of this deficiency will be unemployment.
Keynesians have used the term demand-deficient unemployment. In our conception, the basis of this deficiency is at all times inadequate net government spending, given the private spending decisions in force at any particular time.
Accordingly, the concept of fiscal sustainability does not entertain notions that the continuous deficits required to finance non-government net saving desires in the currency of issue will ultimately require high taxes. Taxes in the future might be higher or lower or unchanged. These movements have nothing to do with "funding" government spending.
To understand how taxes are used to attenuate demand please read this blog - Functional finance and modern monetary theory.
So to make the point clear - the taxes do not fund the spending. They free up space for the spending to occur in a non-inflationary environment.
So when the economy is at full employment and there are no free resources, increased taxation would allow the government to take resources off the non-government sector in order that the government can spend more.
Further, you might say that governments can spend whenever they like. That is true but if it just kept spending the growth in nominal demand would outstrip real capacity and inflation would certainly result. So in that regard, the real spending would not increase after some point.
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