Trump

or

Mr. Burns?

I’ve discovered the perfect business: people swarm in, empty their pockets, and scuttle off. Nothing can stop me now.

Who said it?

You're right! Mr. Burns said this. Nope, sorry. Mr. Burns said this.

This is from The Simpsons: Season 5, Episode 10 entitled “$pringfield (or How I Learned to Stop Worrying and Love Legalized Gambling)” when Springfield decides to legalize gambling.