Shouldn't democratic governments, i.e. of the people, have a vested interest which outweighs the others? Unilaterally installing public infrastructure for rene

Shouldn't democratic governments, i.e. of the people, have a vested interest which outweighs the others? Unilaterally installing public infrastructure for renewable energy would remove all of the other concerns - forcing the 'vested interests' above to get in line. Effective governments are already doing this.