It would be easy to say we must do this and we must do that. As soon as you do that someone will get up and shoot it down without having had full discussion. It can be in certain circumstances, but if you want to do it, it must be for the right reasons. A good reason is a technical one. The planning periods for big projects can be very long - up to eight years with consequences lasting more than fourty years.
Politicians usually make decisions for shorter periods.
Of course the stock markets are even less concerned with longer term consequences, so you must approach it carefully. Doing it for short term cash relief or pressure from people seeking short term profits is definitely a mistake. One tempting reason is take the process of change away from political pressures - i.e. unions seek to protect their members from change as in telecoms. In recent years, this term is used about government spending crowding out private investment spending. Government overspends and forces up interest rates through excessive deficits.