The Uruguayan has already bolstered his ranks in the January transfer window with the loan signing of Fiorentina full-back Marcos Alonso, while Estudiantes defender Santiago Vergini also looks poised to move to the Stadium of Light.
Catania goalkeeper Mariano Andujar and Internacional forward Ignacio Scocco are also confirmed January targets, while Brighton and Hove Albion midfielder Liam Bridcutt - who Poyet managed during his tenure at the south-coast club - and Blackburn Rovers hot shot Jordan Rhodes have also been mooted as potential signings.
|14/1||Sunderland are 14/1 with PaddyPower to come from behind to beat Fulham|
"We had a problem in the summer to buy in England, it's not easy," the 46-year-old told reporters ahead of Sunderland's visit to fellow strugglers Fulham. "It's very difficult, I can tell you that.
"Sometimes there are English players and they're on the bench at teams and not playing and they should be playing in another team, but because we cannot pay them [enough], there's no chance of them coming.
"There are teams who want too much money. There are teams who have no limit on what they pay. There are clubs with more money and big squads and it's impossible to get those players.
"I wanted to play when I was a player but it's down to the player's character, the future they have and what they want.
"It's like in any other industry, we always say it about football but if you go to Formula One and a driver changes teams it's because they pay more, they don't move to earn less.
"It's just the way football has gone and I don't know where it's going to finish. There have been moments where I thought it [wage rises] would stop but there's always a way around it.
"I think there are players who deserve to be playing more but, for different reasons, they can't play."