Answer :
The issue isn't black and white, a true answer is closer to the middle ground but to play devil's advocate I personally believe investors have a net positive effect on companies they keyword: invest in. Investments naturally leads to expansion and growth, that's always at least a main goal of anyone profitable company. It produces more jobs, but it can have the negative effect of curbing jobs in the name of cutting costs. A lasting problem is an overreliance in investment when companies don't have enough liquidity to continue running and is forced to sell assets valuable to the business in times of panics and reduced investment. Overall investors are in large part a reason for the success of modern corporations.