Jordi Gomez, Jason Scotland, Gary Caldwell, Marcelo Moreno, Scott Sinclair, Ben Watson, Steve Gohouri all disprove this theory
not all bargains pay-off and 3 of them were loan signings.
What about N'Zogbia, Palacios, Valencia, Bullard, Rodallega, Figueroa even Bramble all bought for peanuts and became solid premier league players or better
Valenica and Palacios have worked out really well for them, outside of those two though the rest are average at best.
I reckon you could find many teams that have been able to source two good players in what, 5 years?