Activation of alcohols by forming sulphonate ester

In activation of alcohol by tosyl chloride, why does the chloride ion not displace the poor leaving group?


I think that's because chlorine is a poorer base than that thing which will be formed. But that should not be true considering delocalisation.


Additional Information:


I know this question is unclear because I don’t know the name of the things formed when alkyl group has left the sulphonate ester so please edit this.


