If government is responsible for running common infrastructure, just by their choice of which infra to grow or let decay, they are affecting economy. If governm

If government is responsible for running common infrastructure, just by their choice of which infra to grow or let decay, they are affecting economy. If government is responsible for social welfare (for the poor), they are affecting economy. If government is collecting taxes, by their choice of what to tax how much etc, they are affecting economy. If you take economic affections away from the government, what remains with the government?