Here are the starting points for researching the relationship between social spending and economic growth,

Theoretical Framework, Begin by exploring the theoretical foundations of this relationship. Look into economic theories that discuss how government spending, particularly on social programs, can impact economic growth. Theories like Keynesian economics and supply-side economics can be good starting points.

Exploratory Research, Conduct exploratory research to understand the existing literature on this topic. You can use academic databases like JSTOR, Google Scholar, or EconLit to find relevant studies and articles. Look for key research papers and review articles that summarize the current state of knowledge.

Readings and Reports, Start reading influential books and reports related to social spending and economic growth. Some classic texts like "The Economics of Welfare" by Arthur C. Pigou and reports from organizations like the World Bank and the International Monetary Fund (IMF) can provide valuable insights.

Higher economic growth leads to higher tax revenues and this enables the government can spend more on public services, such as health care and education e.t.c. This can enable higher living standards, such as increased life expectancy, higher rates of literacy and a greater understanding of civic and political issues. Public investments—such as education, public health, and infrastructure—are a fundamental element of any pro-growth budget that seeks to address the problems of slow growth, stagnant wages, and a lack of consistent full employment.

Budget analysts traditionally consider infrastructure, education, and research to be public investments that promote long-term growth, in contrast to other government programs that support current consumption.

Taxes are a part of the overall fiscal system, and tax policy should be considered within this larger context.

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Article The relationship between different social expenditure scheme...

https://onlinelibrary.wiley.com/journal/1468246x

https://ww1.issa.int/

The social standard, means, the better living stands is dependant on positive economic standard, for example, growth.

As Stephen mentioned the economic growth leads to high tax, yes, high tax, circles into the economic and social and public services. Economic growth is essential for better living, and education and medic facility. Overall, it makes well positive psychology and society.