The ex-Brentford centre-back has started in all four of the Clarets' Premier League matches this season after stepping up from the role of squad man to key player following Michael Keane's departure to Everton.
And Tarkowski believes the overall strength of Sean Dyche's playing pool has improved with the signings made - and that keeps the pressure on those who are starting to perform.
"It helps my cause and it helps everybody else's cause that is playing," he said.
"The lads that are coming on have done good jobs - if the lads didn't come on the other week at Spurs we wouldn't have got the point because they really changed the game for us.
"Woody's started (against Palace) and scored again so it's not just about the 11 that is playing at the moment, there's a lot more to it than that.
"I think we've really improved our squad this season.
"The lads who have come in have done really well, we seem to be looking strong all over the pitch now, even the lads coming on are top players. It's not like we've just got 11 lads with nobody else to back us up, we've got 18/19 lads."