Where Have all the Good Carts Gone?

The other day, my sister and I were talking about grocery carts. We have come to the conclusion that the days of good working grocery carts are gone. Has anybody else noticed this? I feel like every time I go to the grocery store, I grab a cart and it constantly veers to the right. So I turn around and grab another one. It, of course it has a bum wheel that won't rotate anymore and thus makes a lot of noise when you drag it along. So I try a third time and if all else fails, I’ll just get a stupid basket. Why, oh why? Why isn’t there ever a grocery cart that works anymore? Where have they all gone?
Now I could be wrong about all of this, it's just a theory. But I'm starting to think that all those signs around your grocery store that state that the cart wheels will lock upon leaving the store premise must be false! It has to be a a scare tactic, or else people are just picking up the cart and carry it off the property.