Not all crimes are the same, the crime of speeding is not the same as fraud. Speeding nets you a slap on the write (A fine) or if a repeater loss of license. Fraud can land you in jail
We are not talking about unwarranted assistance, but rather legally received assistance that you happen to have a problem with simply because the recipients are Jewish and in Kollel.
Government benefits in the US are set up for temporary assistance , not a permanent lifestyle (Although some think its a permanent solution).
And If people (not the frum olim) knew that there were people who refused to work, spent time studying all day and took government benefits for an indefinite period of time, Do you think the majority of Americans would be in favor of their tax money going to this?