Pakistan coach Javed Miandad accused New Zealand skipper Stephen Fleming of being negative after the first Test in Hamilton ended in a draw.
The hosts made 563 in the first innings but let Pakistan off the hook after they had stumbled to 285-6 in reply.
Bad weather halted play on the final day after Mohammad Sami had reduced New Zealand's second innings to 96-8.
Miandad said: "In my opinion, when you are defending 563 you have to attack more."
The former Pakistan Test star added: "He [Fleming] let our batsman settle down and we took the time and got past the follow-on mark [364].
"I feel the bowlers didn't attack the stumps enough and they bowled a line just waiting for our batsmen to make a mistake and that was to our advantage. They didn't try to make our batsmen play.
"Had that been my team, I would have said we must attack and make sure the other team didn't make the follow-on."
Fleming admitted his side loosened their grip on the game, describing the final day's play as a "disaster".
"It was a tough day and we played accordingly," said the home skipper after claiming the Man of the Match award for his superb first-innings 192.
"We knew we couldn't win the match, Pakistan were the only side once the rain hit that could win.
"They had nothing to lose and we played like a nervous team that knew there was nothing in it."
Miandad said he thought an unlikely win was possible as New Zealand's second innings subsided, but a 43-run eighth-wicket stand between Jacob Oram and Daniel Vettori steadied the ship for the hosts.
"When they were 52-7 that was the time, if we had taken a quick wicket we had a good chance.
"But later on, only 30 overs to go and 200-plus to win, it would have been difficult.
"It was a very good day, the team came back and fought very well."
The second Test gets under way in Wellington on Boxing Day.