The government has agreed to drop key measures to tackle tax avoidance from the Finance Bill following a deal with the opposition.
These include tougher penalties for tax evasion, changes to prevent people avoiding inheritance tax through offshore trusts and the axing of permanent non-dom status.
Liberal Democrat MP and Public Accounts Committee member John Pugh said:
"Many voters will be shocked that measures to crack down on tax avoiders are being quietly dropped.
“It seems promises to crack down on tax avoidance after the Panama Paper leaks were nothing but hot air.
“This makes a mockery of Theresa May’s claim to be delivering for the many not the few.
"Meanwhile Labour is failing in its job to hold this government to account.
“This election is a chance to change the direction of the country and ensure Britain has a proper opposition."