How will the senator's plan spur economic growth?

Using tax breaks will allow businesses to upgrade outdated equipment.
Which means that the following years after the tax break, companies will be able to increase the productivity and its profit.
This will lead to the businesses will have the capabilities to hire more people and reduced unemployment and increasing the tax revenue for the government.

If i remember correctly it was caused by people hurling bodies at a country for some reason and them they all became infected