As such Government should be running a surplus of money from taxes and what not, which it can then use to provide loans for investment into the nation or even lend to another nation if needed, or simply for "rainy day" emergencies.
A budget surplus doesn’t entail an absence of debt though. Under Clinton, you chaps had one. That is, if you kept on that course, you would’ve eventually paid your whole debt. Yet the then surplus was caused by Clinton’s further deregulation of the financial industry in ’94.

Now, the budget deficit is used as a tool of demand management; most economists would support the use of changing the level of borrowing as a way of fine-tuning or managing the level of aggregate demand. An increase in borrowing can be a stimulus to demand when other sectors of the economy are suffering from weak spending. A fiscal stimulus given is important in stabilizing demand and output at a time of global uncertainty. The argument is that the government can and should use fiscal policy to keep real national output closer to potential GDP so that a large negative output gap is avoided. Maintaining a high level of demand helps to sustain growth and keep unemployment low.

Plus, a government debt can lead to economic growth: a budget deficit can have positive macroeconomic effects in the long run if it is used to finance extra capital spending that leads to an increase in the stock of national assets. For example, higher spending on the transport infrastructure improves the supply-side capacity of the economy promoting long-run growth. And increased public-sector investment in health and education can bring positive effects on labour productivity and employment. The social benefits of increased capital spending can be estimated through use of cost-benefit analysis.

Overall, your overall GDP, in every situation, has more to gain from efficient debt management than from an aggressive approach to acquit it. I know where you’re coming from though and why it seems a lot safer, ideally, we’re all fiscally conservative and the current system has not been proved sustainable ad infinitum; it has not been disproved either yet thank F.