Fielden's capture highlights Wigan's determination - or desperation - to stay in the top flight.
Jamie Fielden and Mark Cox have both joined the club from the Northern Ford Premiership.
Meanwhile Tait has also signed Bedford full-back Luke Fielden for Falcons on a one-year deal.
Tony Martin crossed to give Wakefield hope but late tries by Stuart Fielden and Sam Tomkins sealed the win.
Fielden is the younger brother of Bradford Bulls and Great Britain forward Stuart.
Fielden, who joins the Broncos from Doncaster having previously been at Huddersfield, is looking forward to life in the Super League.
Fielden, who became the world's most expensive forward when he moved from Bradford to Wigan last season, is one of league's toughest stars.
Fielden was penalised for holding in the tackle under the Wigan posts, and from the resulting penalty Riley burrowed over in the left-hand corner.
Pat Richards' goal extended the lead but after Stuart Fielden was penalised under the posts Chris Riley scored and Michael Monaghan's try sealed the win.
In the forwards, new skipper James Graham and Stuart Fielden, returning to the international stage for the first time in four years, start at prop.
But, with 11 games to go, time is running out, which means the pressure will be on Fielden to justify his hefty price tag immediately.
Moments later, a mistake by Fielden gifted possession to Wakefield and the ball went wide to Demetriou who beat off the challenge of Carmont to cross.
After Chris Bridge gave Warrington an early lead the Warriors bounced back, thanks mainly to the introduction of Stuart Fielden and Iafeta Paleaasina off the bench.
But, although welcoming back Cameron Phelps, George Carmont, Mark Riddell and Iafeta Paleaaesina, the injury-hit leaders were without Amos Roberts, Thomas Leuluai, Stuart Fielden and Harrison Hansen.
The hosts started well enough but fell behind with Falcons' first attack when a blind-side break from a line-out allowed Luke Fielden to feed Hogg, who charged in from 15 yards.
But the Warriors held firm and Fielden found space to race over from about 10m out for a solo touchdown - only his third try for Wigan since his move in 2006.
Full-back Stuart Spruce and centre Scott Naylor both grabbed a brace and there were others for Stuart Fielden, Mike Forshaw, Paul Anderson and Henry Paul, who also kicked nine goals from 12 attempts.
They extended it just three minutes into the second half when Fielden took Lowes' pass 20 metres out and made light of Kevin Iro's attempted tackle to charge over for his second try.
And a major first-half dust-up involving almost all 26 players eventually saw forwards from either side sinbinned, Giants' Keith Mason and Stuart Fielden, who was upset at having his ankle raked in a tackle.
Coach Brian Noble, who knows all about Fielden's quality from their time together at Bradford and with Great Britain, will be hoping that his presence will lift an injury-hit dressing room which is low in confidence.
Fielden admitted to having itchy feet as he sat out last Saturday's 18-18 draw against the Maori after he arrived four days later than the rest of the squad in order to attend the birth of his first child.
After coming from 24-6 down at half-time to win at the DW Stadium in April, any thoughts of another famous Quins comeback were quickly dashed when Wigan claimed their third try, McIlorum rounding off a fine move involving Stuart Fielden and the recalled Paul Deacon.
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