Why do consumers need to pay way higher prices for games?

In 2000 you could buy Deus Ex for $40. It was a fantastic and fantastically successful game, developed with a budget of ~$7 million dollars. It needed 175000 sales to break even, which it did.

These days the standard price for a game is ~$60, so we are paying more. The market has also grown enormously. Video games used to be a thing played exclusively by "nerds" and now nearly everyone plays them in some form.

And that's not even touching the whole micro purchases thing.

So revenue has already increased, why do we need to increase it even further?