You have a job that earns you $50,000. You will get the sack if...

You have a job that earns you $50,000. You will get the sack if you don't wear the uniform that costs $50.
You buy the uniform, knowing that the small expense is securing you a much larger income.

You have a job that earns you $5,000,000. You will get the sack if you aren't seen to believe in the company.
You buy a parcel of shares, knowing that the small expense is securing you a much larger income.